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  • 51.
    Jber, Abed Almalik
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Friction Stir Welding Modelling and Simulation: Backing plate material thermal conductivity effect on temperature profile2016Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis presents a FSW modelling of temperature using ANSYS APDL 16.2 (Ansys Par-ametric Design Language). It intends to predict the thermal distribution by taking into ac-count different thermal variation imposed by different backing plate material. The effect on the cooling rate, and peak temperature was studied using finite elements analysis (FEA) tech-niques. For more validity the simulation’s results were compared with temperature data ac-quired experimentally under similar conditions.

    A thermal transient modelling of friction stir welding were developed, by considering a moving heat source was considered. The heat input was obtained from the friction between the tool shoulder with the workpiece in the heat transfer analysis. The heat flux is calculated in the finite element analysis model considering the heat input generation from the tool’s shoulder and probe.

    An accurate temperature measurements during FSW process is a challenging task for ex-perimental measurements since it performed using thermocouples type K that embedded into the workpiece and the (TWT) tool-workpiece thermocouple to measure temperature during FSW.[1]. The peak temperature and cooling rate in different positions were registered for welds using different backing plate materials with different thermos conductivities.

    By the data analysis, it was verified that the backing plate material diffusivity affects the peak temperature and cooling rate. On both, simulation and experimental results, the temperatures were higher when a material with lower thermal conductive was used as backing plate. The experimental results have validated the model, in both peak temperature and the cooling rate.

  • 52.
    Johansson, Kristina
    et al.
    University West, Department of Social and Behavioural Studies, Psychology and organization studies.
    Sandström, Kristina
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    European co-coperative education- can we formulate an mutual understanding2016In: ViLär 2016, konferens 8-9 december 2016, Vänersborg / [ed] Kristina Johansson, 2016Conference paper (Other academic)
  • 53.
    Johansson, Kristina
    et al.
    University West, Department of Social and Behavioural Studies, Division of Psychology and Organisation Studies.
    Sandström, Kristina
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences. University West, Department of Engineering Science, Division of Industrial Engineering and Management, Electrical- and Mechanical Engineering.
    ISO- WACE – ett samtal om hur vi kan utveckla AIL internationellt tillsammans2015Conference paper (Other academic)
  • 54.
    Johansson, Oscar
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Mandaric, Katarina
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Fysisk simulator för produktionsflöden2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This final year project has been carried out at the Production Technology Centre at Innovatum AB in Trollhattan. Aim of the work was to develop a prototype of a concept for a physical simulator for production flows. Based on a core idea of the demonstrator, the goal was to develop a concept in the form of a game, to be used to increase the understanding and illustrate the development opportunities and problems in production flows. Some of the main questions in the thesis are what information is desired to visualize and how can a game for visualization of production flows be built to examine different aspects of the flow. This approach was chosen to be implemented in five phases; clarify the problem, external search, internal search, explore systematic and reflect on solutions and the process. Stage two of the approach was the foundation of information and knowledge that the authors needed to build the study. The theory is based on three main areas which are logistics, Lean, and games and learning. The interviews are conducted with individuals from the private sector and the universities Chalmers University of Technology and University West.

    In the concept development has six sub-problems been identified and to each sub-problem there were a number of solution fragments. In the process of selecting the different solutions that could be used for the prototype, the authors chose to use pros and cons based on the opinions of the authors and primary stakeholders. Other methods used were intuition and favorite products. The authors tested the prototype on two focus groups, through the results the authors could make changes in the soft value and draw conclusions about the concept. A workshop was held with secondary stakeholders in order to analyze and evaluate the concept.

    The prototype is considered to be more suitable for a learning purposes with students as a target group. That is because companies are in need of a demonstrator that is designed with more complexity and opportunities. The authors believe that the concept is worth spending more time and money for to further develop. An app is considered as a good complement to the concept which could be developed and used more extensively.

  • 55.
    Karimi Neghlani, Paria
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    SLM additive manufacturing of Alloy 718: effect of process parameters on microstructure and properties2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Selective laser melting (SLM) is one type of the Additive Manufacturing (AM) processes as a novel technique to fabricate 3D components in a layer-upon-layer style with less need to post-processing. In the SLM process, samples can be designed by computer-aided design (CAD) software, and produced in any shape. Compared to other AM processes, SLM method presents several advantages, one of which is manufacturing of complex-shape samples with very high accuracy. In SLM process, the microstructure characteristics and mechanical properties can be controlled by changing process parameters. Therefore, SLM process can be used to manufacture many industrial components, e.g. combustion chambers, medical components, and nuclear reactors.

    In the present survey, SLM process with different process parameters is used to create 25 cubic samples from Alloy 718 with 10×10×10 mm3 dimension. The as-fabricated samples are cut into two subsets in order to study the influence of two main process parameters including point distance and laser exposure time on the microstructure and properties. The samples are hot mounted to examine the normal reference planes (parallel to build direction). Microstructural characterization has been carried out using Optical Microscopy (OM), Scanning Electron Microscopy (SEM), Energy Dispersive spectroscopy (EDS) and X-ray Diffraction (XRD). Microstructure in the as-fabricated section of sam-ples illustrated highly dendritic growth parallel to build direction in the normal reference planes. The microstructures present some changes within the build direction; the top layers show coarser columnar dendrites compare to the bottom layers with slimmer columnar dendrites owing to a higher cooling rate. SEM/EDS analysis show the presence of some fine phases e.g., Laves and metallic carbides in the γ-matrix and verify the segregation of Nb element in all 25 test samples due to high cooling rate. The porosity content of samples is measured using two methods of image analysis and point counting. The effect of laser energy input, which comprises the effect of laser exposure time and point distance is investigated on the total porosity (round and irregular pores). It is observed that the round porosity content is lower than irregular porosity and the minimum amount of total porosity is around 0.07 vol. % gained at laser energy input of about 265 J/mm3. Mechanical properties is represented by measuring the Micro-Vickers hardness (HV). The microhardness of as-fabricated samples shows a dependency on the laser energy input on the normal reference plane in all the samples. The average microhardness in the as-fabricated samples varies from 291 to 339 HV0.5.

  • 56.
    Karlberg, Eric
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Högberg, Rickard
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Kartläggning och utveckling av leverantörsamarbeten: En fallstudie på en inköpsavdelning2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This project is performed in Serneke Bygg AB in Gothenburg. The aim of the project is to identify methods for identifying and mapping critical suppliers of Sernekes projects and identify approaches for promoting long-term agreements resolving relationships while competition between suppliers is preserved. Only suppliers who in 2016 invoiced 10 million SEK or more to Sernekes projects will be considered.

    The objectives of the project were to answer the following questions: • Identify method to categorize suppliers. • Identify the success factors for promoting supplier relationships. • Present proposals for working methods, with the aim of promoting the company's supplier relationships.

    The project has been implemented as a problem-solving, and a normative study. The study approach has begun whit literature study in relevant topics. After the data collection, has methods to identify and categorize suppliers analyzed. From the theory and data collection the result of the study was compiled. The construction industry is characterized by the purchase accounting for 60-80% of the total project costs. This relationship means that the importance of purchases has grown increasingly over other functions in the company. The company wants to work with multiple suppliers because they believe that the market is homogeneous, and they can use competition to reduce costs. The conclusions are that Serneke initially should create a plan for the segmentations process and how it will be implemented in the organization. Serneke should initially start the process of segmentation at a level that the organization believes is manageable, for the organization to see the results of the segmentation. Serneke should formulate three to five segmentation criteria that the company can use in the segmentation process. Serneke can assess suppliers scale of interaction. This by placing the supplier in an interaction model. Success factors for promoting Sernekes supplier relationships is to understand how to act against suppliers, depending on what market suppliers act in.

  • 57.
    Karlsson, Axel
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Framtagning av beräkningsmall för rullaxlar2015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this project the possibilities to improve Hofpartner AB's calculation model for reel shafts has been investigated. The investigation has focused on user friendliness, economy and strength calculations. The goal was to make the model easier to use.

    An investigation of the current model shows that it is difficult to follow the calculations and that the results in most cases are not particularly accurate. Thus the work is focused on identifying the existing problems and improving on them.

    Several of the functions in the model are removed and the model now only handles information that are used with some regularity. By reducing the amount of data covered by the model possibilities is seen to simplify usage and to reduce the amount of necessary prior knowledge.

    New formulas for the strength calculations are presented and implemented in a new model. The formulas are verified by analysis with FEM. The analysis shows that the model is providing results close to the real values.

    The economical calculations are constructed as a basis for Hofpartner to continue developing. The necessary formulas are implemented but an investigation of the company's production process is necessary to achieve correct results. The newly constructed model mostly contains estimates of costs related to production time and material. If these estimates are updated with correct values Hofpartner has the possibility to achieve very reasonable results in their model.

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  • 58.
    Karlsson, Erik
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Åkerlund, Per
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Utvärdering av Prio-tal för produktionsstyrning för GKN Aerospace Sweden2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is performed at GKN Aerospace Sweden AB in Trollhättan. The purpose of the thesis is to evaluate the principle for production control Prio-tal, which GKN Aerospace developed. The goal of the study is to evaluate Prio-tal in comparison with other production control principles that from an assessment are considered relevant. The thesis is limited to comparing Prio-tal to the FIFO principle with focus on the factors; throughput time, tied up capital and service level. GKN is a manufacturing industry with mainly function-oriented product flows. What makes the thesis focus is to investigate on how the production control principle Prio-tal affects a function-oriented production. This thesis is a qualitative and quantitative study conducted with the help of including interviews, observations and brainstorming. The evaluation is performed with a simulation model in the computer program Simul8. The simulation model contains four fictitious product flows who interact with each other. The simulation model was used to conduct experiments that generates comparable results to the defined factors. To structure the experiments DoE (design of experiments) was used. Throughput time, capital and service is contributing factors to maintain a smooth production flow. To increase customer value to manufacturing, companies strive to reduce the throughput time and therefore achieve a good delivery service. By reducing throughput time more capital is free, capital that can be added on, for example development. The results from the simulation study demonstrate that Prio-tal performed better than FIFO according to the factors; throughput time, tied up capital and service level. The comparison establish that throughput time is shorter, more capital is released and the service level increase. The report's discussion deals with restrictions that affect the project overall. Prio-tal is discussed from the perspective of sustainability where the company through the release of capital can use the released assets to example development of more environmentally friendly aircraft engines. Finally the discussion is about the Prio-tals ability to generalize. Since the evaluation of Prio-tal referred to a type of business as GKN's production system, it-ispossible-to-use-Prio-tal-in-other-function-oriented-production-system.

  • 59.
    Karlsson, Hanna
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Tullock, Hanna
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    User perceptions of belt in seat installations: A comfort and mobility study2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis' work has been conducted at and made possible by Autoliv Sverige AB in Vårgårda. The aim of this thesis is to study how the occupant experience of the belt changes when it is moved from a traditional installation point in the car's B-pillar, to the seat. This shall be studied in terms of how the perceived comfort is influenced by a belt in seat in an upright and a reclined seat back position of 20 and 45 degrees, for different sizes of occupants. Also how the ability to reach a belt in seat is affected by the size and mobility of the occupant. Based on this new knowledge, an optimal outlet position for a belt in seat shall be proposed, from a comfort perspective. The work has used a cross-sectional research approach to achieve its purpose. Through the cross-sectional approach, several different qualitative and quantitative methods have been used. Initially, a literature study where subjects relevant to the forthcoming study was studied. Meanwhile, a competitive analysis of existing belt in seat installations in new cars available on the market was planned and carried out. In the main element of this work, a two-part comfort and mobility study with a belt in seat was performed. The study combined the methods interview, survey and observation. Through the interview, qualitative questions were asked as a complement to the quantitative responses given by the test subjects on scales in the survey. Observations were used to observe the subjects' behavior and difficulties regarding the belt in seat. A major limitation of the results of the study is the deficient distribution of sitting heights and genders in the group of test subjects, which founded a certain bias in the results. This has been the reason why it has not been possible to draw any certain conclusions from the results, however, some trends have been seen. The comfort study revealed several different assessments of the belt that contributed to discomfort, including the perception of the belt being too close to the neck or too far out on the shoulder. Additionally, the discomfort significantly impaired when the seat was reclined to the relaxed state. The mobility study showed that more subjects felt limited by their own bodies in the movement than by the belt. In addition did the reversed belt geometry create large discomfort issues at the neck. An important conclusion of this thesis is that the seat's design is as important to the customer experience of discomfort of the belt as the positioning of the outlet. It has also become clear that the accessibility of a belt in seat is strongly limited, as it was tested in this study.

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  • 60.
    Karlsson, Robin
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Projekteringsunderlag för hydraulisk rörspräckning och granskning av utfört projekt2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Examensarbetet har utförts på uppdrag av Trollhättan Energi AB, som önskat erhålla ett projekteringsunderlag för ett kommande förnyelseprojekt samt ett granskningsunderlag av ett nyligen utfört arbete. Syftet med rapporten är att förbättra den interna kunskapsnivån angående beräkningsmetodiken för om hydraulisk rörspräckning är en möjlig metod, tänkbara rörmaterial vid metoden och om dimensioneringsmetodiken för rör som föreligger, för att motverka komplikationer i framtida projekt.Rapporten innehåller en ekonomisk kalkyl om huruvida schaktfri ledningsförnyelse är fördelaktigt kontra schaktning, utifrån de projekt Trollhättan Energi AB utfört mellan åren 2009-2015. Därefter följer en redogörelse för om hydraulisk rörspräckning är en möjlig metod vid ett kommande förnyelseprojekt i Sjuntorp, där beräkningsmetodiken för om metoden är möjlig behandlas. Vidare följer en kartläggning av tänkbara rörmaterial vid hydraulisk rörspräckning, som identifierats via en litteraturstudie och ett flertal intervjuer med personer inom branschen. Därpå behandlas dimensioneringsmetodiken för ett rör i samband med en uträkning för projektet i Sjuntorp. Slutligen följer en sammanställning av en enkätundersökning angående hydraulisk rörspräckning som genomförts i projektet och en granskning av ett nyligen utfört rörspräckningsprojekt på Stallbacka industriområde.I slutsatsen konstateras att schaktfri ledningsförnyelseteknik är att föredra, varpå hydraulisk rörspräckning bör utföras där möjlighet föreligger. Det belyses även att hydraulisk rörspräckning är en möjlig förnyelsemetod för det kommande projektet i Sjuntorp utifrån rådande förutsättningar, men att en geoteknisk undersökning krävs för att ytterligare säkerställa det här. Vidare betonas att polyeten, PE100, med en skyddskappa av polypropen är ett lämpligt rörmaterial, men att spaltens storlek har stor inverkan på huruvida dimensionerande värden överskrids för SDR-klass 17, varpå segjärn kan vara ett alternativ beroende på kostnadsskillnaden gentemot en högre SDR-klass. Samtidigt är det möjligt att rör av polypropen med en hög elasticitetsmodul kan komma att användas i allt större utsträckning i framtiden. Slutsatsen av enkätundersökningen är att polyeten är ett vanligt rörmaterial vid hydraulisk rörspräckning och att en noggrann undersökning av de förutsättningar som föreligger är viktigt att beakta. Till sist konstateras utifrån granskningen av projektet på Stallbacka och i likhet med enkätundersökningen, att en utredning av rådande markförhållanden är central. Dessutom kan det fastställas att beräkningen för om hydraulisk rörspräckning är en möjlig metod, var bristfällig, samt att segjärn eventuellt borde använts som rörmaterial motiverat av högre diffusionstäthet.

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  • 61.
    Khalil, Joseph
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Abbas, Mohammed
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Lösningsförslag på uppbyggnad av befintlig arbetsstation2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The production leadership in the factory is aware of a logistical problem. Because of priority reasons this problem has not been resolved.  At the moment there are several different reverse gears in the assembly station which are rarely ordered by the customer, therefore the need for these articles decreases in production. This means that large areas are occupied by too many reverse gears. The production area should be utilized more effectively. Volvo Penta AB is a division of Volvo AB, which develops, manufactures and markets engines and propulsion systems for recreational, marine and industrial applications. The factory in Vara is specialized in the manufacture of marine diesel engines. The factory also manufactures larger engines. The aim of the project is to change and simplify the work for the operators in the production area and the assembly station that is occupied by the reverse gears. The goal of the project is to present a proposal on how a new assembly station for the reverse gear can be designed. The station will be designed as efficiently as possible. To fulfill purpose and goals a performed data collection was executed, as well as literature studies and fact-finding. The theory treated primarily lean manufacturing, and ergonomic design of the workplace, material supply, proofing, cementing and sequencing. Data collection was conducted through a situation analysis which examined the current station. Benchmarking was carried out at Volvo Powertrain Production AB in Skövde, Swegon AB in Kvänum and Volvo Penta in Vara. Collection of facts and information was made in the form of on-site observations, interviews and workshops with employees. The process of finding solutions started with identifying requirements of the station. In order to find solutions, different types of stations were studied. The existing station was studied to examine whether changes could be made in the racking. Another idea was to move the reverse gear buffer and to introduce sequencing and cementing, alternatively to move the entire station. One alternative is to move the station, unless a better solution for the existing surface is presented. At the same time, there are possibilities to develop ergonomics and efficiency. After a benefit analysis the group went ahead with two suggestions, which were a variable cementing wagon elsewhere in the factory, or cementing at the station. These suggestions were weighed against the benefit analysis, where the benefits were valued, and the chosen alternative was cementing at the station. Our proposal is intended to be a guidance for Volvo Penta, and can be developed further as it is implemented.

  • 62.
    Kristensen, Joakim
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Hansson, Rickard
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Simulation and calculation of the thermal dissipation in a battery pack2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Batteries used to propel automobiles today have a lot more capacity than 16 years ago when the lithium based batteries were discovered. Lithium-ion batteries are frequently used in the automobile industry, however, lithium based batteries are very sensitive to the charging level and operating temperature. So it is important to have a cooling and heating system to ensure that the batteries stay within a limited operating range in order to optimize their usage and avoid thermal runaway.

    A battery pack with implemented cooling system was identified through data and STEP-files provided by NEVS, and COMSOL Multiphysics were used to simulate the system in order to observe the thermal dissipation. Simplifications were done to be able to easily mesh the model, shorten the computation time and also because of the limitation of knowledge in more complex areas in order to perform the simulation. The refrigerant used was EGL (ethylene glycol), a commonly used refrigerant in the automotive industry, and the flow type of the refrigerant was identified through the use of the dimensionless quantity Reynolds number. After showing that the flow is laminar, a non-slip boundary condition was defined for flow in the simulation meaning the refrigerant will have zero velocity at a solid boundary.

    The heat generation of the battery cells was identified through calculations of the joule heating and dissipated energy in the electrode over potentials. The velocity, flow and heat transfer of the refrigerant can differ depending on the size and form of the cooling pipes, so different pipe profiles were experimented with to identify an optimal profile. Results of the simulation using the batteries maximum current (given by a curve illustrating the amperage passing through a battery cell during a test drive) showed that the maximum temperature by far surpassed the limited operating range.

    After analyzing the given system, it was observed that the battery pack received a sufficient amount of cooling to keep the temperature between the operational parameters. However, the simulations showed that the modules that were connected in series didn’t have as optimal cooling as the modules connected in parallel. Because as the refrigerant passes through the first module it transfers heat from the module to the refrigerant (which is the definition of cooling) and thereby have a higher temperature as it passes through the second module than the first one, giving the second module a higher overall temperature. Because of the higher temperature in the second module, it is also more prone to aging. The analysis of the different profiles showed that even though there is a difference in velocity as the refrigerant passes through the cooling pipes, the heat dissipation showed a low difference. Giving only a difference in temperature of 3°C.

  • 63.
    Kumara, Chamara
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Modelling of the temperature field in TIG arc heat treated super duplex stainless steel samples2016Independent thesis Advanced level (degree of Master (Two Years)), 40 credits / 60 HE creditsStudent thesis
    Abstract [en]

    Super Duplex Stainless Steels have superior corrosion resistance properties and strength compared to conventional steels. However, these properties are influenced by the different phases that precipitate during the heat treatment process. The conventional way of studying the time and temperature effects on the properties and micro-structure of SDSS is to prepare many samples at different temperatures and holding times. The welding research group at Production Technology Center, Trollhättan, Sweden, has recently developed a unique heat treatment method to produce a wide range of temperature by using a stationary TIG arc heat source. It results in a graded micro-structure in a single sample at a specific time period. The accuracy of the results ob-ained from this process is highly related to the accuracy of the temperature field model next to weld pool.

    In this work, a model was developed by using OpenFOAM CDF code, to predict the temperature field of the super duplex stainless steel samples that have been subjected to this novel TIG arc heat treatment process. The developed model was able to capture the trend in the overall temperature field in the heat affected zone. However, there was some mismatch between the modelled and experimental temperature profiles in certain locations in the heat affected zone. Further improvements have to be done to the developed model in order to take the phase transformation effect into account. A preliminary investigation has been carried out on how to implement this in the current model and reported in the thesis.

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  • 64.
    Lagrosen, Stefan
    et al.
    Linnaeus University, Kalmar, Sweden.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Service quality in fitness centres: examining the dimensions2016In: 1st International Conference on Advanced Business and Social Sciences, 28-29/1, 2016, Jelantik, Indonesia, 2016Conference paper (Other academic)
    Abstract [en]

    The fitness industry is expanding in most parts of the world. Nevertheless,the amount of research regarding this industry has thus far been relativelylimited. In previous research, quality dimensions for fitness companieshave been explored and a tentative framework has been proposed. Thepurpose for the present study is to examine the framework and quantifyits components. A survey has been conducted. A questionnaire based onprevious research was developed and delivered by telephone to 86 fitnesscentres of which 67 agreed to participate, giving a response rate of 78%.The items of the quality dimensions in the studied framework were analysedwith Cronbach's Alpha and were found to be statistically reliable. Theunderlying structure of the enablers in the framework was examined withexplorative factor analysis resulting in five underlying enablers. Moreover,the impact of the enablers on the profitability of the centres was measured.The results should be interesting for managers in this sector, as well as, forthe advancement of service quality theory.

  • 65.
    Lagrosen, Stefan
    et al.
    Linnéuniversitetet.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Lind, Linda
    Workplace health in the wellness sector: implications for HRM2014In: 29th EIASM Workshop on Strategic Human Resource Management, 24-25/4 2014, Ajaccio, France, 2014Conference paper (Other academic)
  • 66.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Konkret om mental styrketräning: [Bokrecension av boken Tänk låsningar och lösningar av Kjell Enhager]2016In: Kvalitetsmagasinet, ISSN 1104-1579, no 5, p. 58-58Article, book review (Other academic)
  • 67.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Långsiktig livskraft [recension av Organisatorisk resiliens av Stefan Tengblad och Margareta Oudhuis]2015In: Kvalitetsmagasinet, ISSN 1104-1579, no 3, p. 53-53Article, book review (Other (popular science, discussion, etc.))
    Abstract [sv]

    Vad kännetecknar livskraftiga verksamheter, som står emot kriser och levererar goda resultat över lång tid? Det är utgångspunkten i denna djupdykning i begreppet organisatorisk resiliens.

  • 68.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Nå framgång med salutogen kultur: [recension av boken – Salutogen kultur - Från värdegrund till verksamhetsnytta av Anders Hanson]2016In: Kvalitetsmagasinet, ISSN 1104-1579, no 1, p. 58-58Article, book review (Other academic)
  • 69.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Rätt hjärnfunktion krävs för ett effektivt och gott ledarskap: [recension av boken – Neuroledarskap av Katarina Gospic och Stefan Falk]2016In: Kvalitetsmagasinet, ISSN 1104-1579, no 3, p. 50-50Article, book review (Other academic)
  • 70.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Stressa mindre och få mer gjort [recension av Effektiv tidshantering av Bosse Angelöw]2015In: Kvalitetsmagasinet, ISSN 1104-1579, no 1, p. 40-40Article, book review (Other (popular science, discussion, etc.))
    Abstract [sv]

    Tidsbrist är en av dagens stora utmaningar. Här serveras läsaren en rad strategier för att få mer gjort på kortare tid.

  • 71.
    Lagrosen, Yvonne
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Visar vägen bortom glastaket2015In: Kvalitetsmagasinet, ISSN 1104-1579, no 5, p. 50-50Article, book review (Other academic)
  • 72.
    Lagrosen, Yvonne
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Lagrosen, Stefan
    Linnaeus University, Kalmar.
    A healthier working life: the importance of work-integrated learn-ing and physical exercise2016In: 19th QMOD Proceedings. International Confernce on Qualtiy and Service Sciences. Building a Culture for Quality, Innovation and Sustainability, 21-23 September 2016, University of Roma Tre, Rome, Italy / [ed] Su Mi Dahlgaard-Park & Jens J. Dahlgaard, Lund, 2016, p. 1738-1747Conference paper (Refereed)
    Abstract [en]

    AbstractPurpose - The purpose of the paper is to explore the role of learning and physical exercise foremployee health from a quality management perspective. Possible correlations that exist betweenemployees' health, work-integrated learning, physical exercise and dimensions underlyingleadership commitment and participation are examined. A case study has been undertakenat a highly innovative company in Sweden. An additional aim is to examine the possibilities forimprovements for the company has as it is in an expansive state.Methodology/approach - The empirical data are derived from two focus group interviews withselected employees having different functions in the studied organisation and two in-depth interviews.Additionally, a questionnaire has been completed by all employees that were presentduring a company meeting. The interviews are analysed with a method inspired by groundedtheory. In addition a SWOT-analysis was carried out.Findings - The statistical analysis revealed significant correlations between the employees' healthand the dimensions development and being informed. Significant correlation was also found betweenthe employees' health and physical exercise during working hours as well as betweenemployee health and work integrated learning. Moreover, the interviews gave insights into theimportant role that physical exercise during the working day has for employee well-being.Research limitation/implication - Since this is a case study the possibility to generalise thefindings outside the company may be limited.Originality/value - The connection between employee health, work-integrated learning andphysical exercise for employees has not been very well examined in previous research.

  • 73.
    Lagrosen, Yvonne
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Lagrosen, Stefan
    Linnaeus Univ, Dept Mkt, Sch Business & Econ, SE-39182 Kalmar, Sweden.
    Aesthetic service quality: a study of a symphony orchestra2017In: Total Quality Management and Business Excellence, ISSN 1478-3363, E-ISSN 1478-3371, Vol. 28, no 3-4, p. 318-330Article in journal (Refereed)
    Abstract [en]

    The purpose of this paper is to explore service quality in classical music, to relate the findings to the essence of Beauty that Kant, Plato and others describe and to discuss the implications for practice and research regarding aesthetical organisations. Some of the views of Beauty held by Plato and Kant are described and related to the theories of service quality, particularly the fundamental premises of the service dominant logic of marketing. An empirical study has been carried out at the Gothenburg Symphony Orchestra. In-depth interviews with members of the orchestra have provided qualitative data that have been analysed. The musicians’ views of quality in classical music are described. The findings are related to the philosophical theories of beauty and to the service quality theory. A model of quality dimensions in classical music is proposed. The findings of the study provide a vantage point for better understanding of the relationship between aesthetics and service quality. Service quality in music has not previously been studied and related to aesthetical theory. A limitation is that the study has only been carried out in one orchestra in one country. For managers of organisations with aesthetic activities, the study provides guidance into how service quality can be seen and handled.

  • 74.
    Lagrosen, Yvonne
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Lagrosen, Stefan
    Linnaeus Univ, Dept Mkt, Kalmar, Sweden.
    Customer perceptions of quality: a study in the SPA industry2016In: European Business Review, ISSN 0955-534X, E-ISSN 1758-7107, Vol. 28, no 6, p. 657-675Article in journal (Refereed)
    Abstract [en]

    Purpose - The purpose of this study is to explore dimensions of customer perceptions of factors important for a quality experience in the SPA industry and to assess service quality implications for these dimensions. Design/methodology/approach - The empirical study involved seven Swedish SPA hotels. The first part was qualitative, consisting of seven focus-group interviews with hotel guests. In addition, service providers’ perceptions of customer quality were collected through seven quality cafes. The qualitative parts were analysed with the constant comparative technique from the grounded theory approach. Based on the findings from the interviews, a questionnaire was delivered to 400 randomly accessed women. The responses were analysed with exploratory factor analysis and cluster analysis. Findings - The focus-group interviews showed that the customers’ perception of quality could be expressed in the following dimensions: physical effects, mental effects, pleasure and flexibility. The dimensions for customer quality seen from the staff’s perspective were treatments, climate and the SPA facility itself. The exploratory factor analysis defined the following underlying factors: enjoyment, treatments, practicality, fitness, cost and calm. The cluster analysis resulted in four groups of customer profiles: the more of everything group, the enjoyers, the savers and the fitness freaks. Research limitations/implications - Alimitation is that the study has only been carried out in one country. The main implication for research is a better understanding of quality dimensions and perceptions of service quality in the SPA industry. Practical implications - The study provides a comprehensive insight into the dimensions of quality for SPA visitors. Moreover, four distinct groups of customers have been identified. This knowledge should be useful for SPA managers. Originality/value - Only limited amounts of research have previously been carried out in the SPA industry. The paper provides a framework depicting perceptions of quality dimensions in SPA hotels.

  • 75.
    Lagrosen, Yvonne
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Travis, Frederick
    Maharishi Univ Management, Ctr Brain Consciousness & Cognit, Fairfield, IA USA.
    Developing a neuropsychological measurement to capture workplace learning2016In: Journal of Modelling in Management, ISSN 1746-5664, E-ISSN 1746-5672, Vol. 11, no 3, p. 783-801Article in journal (Refereed)
    Abstract [en]

    Purpose - The purpose of the paper is to examine variables to be included in a measurement instrument which measures workplace learning related to recent research into quality management and brain functioning. Design/methodology/approach - A literature review was conducted, investigating measures of workplace learning as well as the connections between brain functioning and management. Further studies will use the brain integration scale to compare levels of brain integration with measures of workplace learning. Findings - The variables “empathy”, “presence and communication”, “continuity”, “influence”, “development”, “work-integrated learning” and “flow” were found to be relevant from the literature review to be tested for inclusion in the measurement instrument. A measurement model with these variables included has been developed. Research limitations/implications - This paper is conceptual in its nature. Empirical studies are needed to validate the propositions. Practical implications - The proposed measurement instrument can be used by managers to gain insight into underlying mechanisms in the organizational culture that influence employees’ learning and potential for development. Thus, it can aid managers to achieve profound learning in their organizations, which is necessary for continuously maintaining high quality of products and services. Social implications - For society, the implementation of the proposed measurement instrument in companies could lead to better health and higher job satisfaction among employees. Originality/value - Traditional ways of measuring working environment are rarely connected to brain functioning of the employees. Only requiring small resources, this approach adds to an understanding of underlying mechanisms.

  • 76.
    Larsson, Emma
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Gren, Maria
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Värdeflödesanalys för kartläggning av ett produktionsavsnitt: En studie för att identifiera och minimera icke värdehöjande aktiviteter vid Rybergs Charkuteri AB2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Rybergs Charkuteri AB is a well-known brand of charcuterie located in the outskirts of the city Uddevalla, on the Swedish west coast. The company has of today 35 employee and had a turnover of 82 million Swedish crones, year 2015. In the production department of producing sandwich topping, employee's estimates that 50 percent of the available working hours consist of non-value adding activities. The non-value adding activities consist of setup of machines between different packages, cleaning equipment and other not specific non-value adding activities.

    As of today Rybergs Chakuteri AB has no information or numerical values which can confirm the employee's estimation. The goal with the bachelor thesis is to determine the process of today with relevant numerical values and present improvements to the process. In order to identify the activities of the process the method value stream mapping has been used. The Bachelor thesis starts with data collection from the production department and all data collection is performed by the authors. Production-workers, the sales office and production manager have been interviewed in the purpose of collecting a wider range of aspects affecting the production department. Benchmarking has been done with two other companies within the food industry in order to offer a wider perspective of how companies within the food industry manage setups and production planning.

    The result of the value stream mapping determined that 66 percent of the available working hours consist of value adding activities, 13 percent of non-value adding but necessary activities and 21 percent of non-value adding activities. The result is shown in three value stream maps, one of each packaging solution and contains the numerical values of cycle time, setup time, throughput time and value adding time. Further are underlying factors to the non-value adding activities discussed and suggestions of how the factors could be minimized or eliminated is presented. Finally, improvement proposals in order to streamline the production department is presented. The authors suggest a change in one of the current packaging methods, the suggestion being, implementation of a pulling production system in order to balance the flow throughout the factory. Further a suggestions are implementing a separate cleaning shift in order to utilize the available working hours and to invest in a folding machine in order to reduce a production worker is discussed the number of working hours and needing an employee less.

  • 77.
    Larsson, Kristoffer
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Jämförande studie av tillverkningsmetod vid cisternbyggnationer2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is a comparative study of the manufacturing method of tank constructions that has been carried out in the spring of 2016. The work has been performed together with the Tank department at Rodoverken AB. Rodoverken builds accumulators, cisterns and pressure vessels with a unique construction method called The spiral method. The aim of the work was to evaluate proposed plate sizes used in the spiral method. The evaluation will focus on the time and cost savings the company can make with the use of different plate sizes.

    The procedure during the work started with studying the theory and the methods that were relevant to the topic. This theory chapter contained both information about the company's building technology and models used in this study to meet its primary goal. In the next step the data collection started, the aim was to gather information and identify which aspects were affected by the extended plate sizes. The data collection was conducted through studies on previous work, observations and interviews. When all the data were collected the analysis work started. An aspect impact study was performed together with the company. The impact study contained all the identified aspects and their consequences. After this an FMEA-analysis was performed based on the previous aspects, this showed the most critical aspects based on the availability, seriousness and the possibility to affect the problem.

    The calculations on this study were carried out on proposed plate sizes that Rodoverken had contributed. An evaluation was made with three different plate designs to calculate the time and cost reduction based on the total meter weld on the tank. The old plate design was used as a reference and two new larger plate sizes were used in the evaluation as well. A summary was made containing the costs that increases when the company starts to use larger plate sizes. This included the cost of transport and the necessary equipment that has to be invested in order to handle larger sheet sizes. The compilation of cost including the cost reduction in welding and the costs of transport and new investments were compiled and provided the total savings of the different plate sizes.

    The total savings of the different plate sizes:

    Plate size 2 (3300x9600mm): 127155 kr.

    Plate size 3 (3200x10700mm): 146800 kr.

  • 78.
    Lehtinen, Jesper
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Myrén, Jennie
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Framgångsfaktorer för effektivare förbättringsarbete2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis was originated by Volvo Penta in Vara announcing a need to shift the focus and streamline the company's efforts for improvement. Previously, the focus had been directed towards the workplace standard and 5S, but now the focus will be on minimizing waste and reducing causes of quality defects and delayed deliveries. The project group was given the perspectives of organizational culture, work structure and leadership philosophy by Varafabriken as a starting point for creating a proposal for change. Along with this proposal for change, the project was asked to provide suggestions for how Varafabriken can achieve a higher efficiency in a customer-focused improvement process after reorganising into teams as well as looking at how management can be structured to make the improvement process in a manufacturing industry more effective. Answering these questions became the main goals for the project.

    Methods used to achieve these goals are literature studies, interviews, surveys, observations and benchmarking. The literature studies provided a picture of how different authors advocate that organizations should be managed to achieve higher efficiency. The 16 interviews revealed that targets in Varafabriken inhibits the improvement work and that the maintenance department that executes improvements does not have sufficient resources. The survey, with 49 respondents, strengthened the answers from the interviews indicated that the target figure related to the number of deviations per week inhibit the improvement work. During benchmarking the authors noted that the majority of the visited companies preferred to neither measure the number of deviations nor the number of improvements per employee and year. It could also be seen that three of the four companies saw a success factor from paying attention to and developing the organization’s personnel.

    Finally, the three perspectives that the thesis was given increased to four; man is the new perspective because the individual is deemed important by the authors. Based on the collected data, a proposal for change was created for Varafabriken. The change proposal is that the Varafabriken should implement Toyota Kata to obtain an increased focus on the factory’s personnel and work more proactively with improvements. Toyota Kata implements a coaching leadership that develops individuals and creates routines and behaviors that lead to a sustained pattern of thinking around improvements. The authors also recommend Varafabriken to liquidate target figures concerning the number of deviations and the number of improvements per employee and year. In addition, focus should be aimed towards the maintenance department as they are essential for the effectiveness of the improvement work.

  • 79.
    Leon Zapata, Diana
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Gapanalys av Bror Tonsjö ABs ledningssystem mot ISO 9001:2015 och 14001:20152016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis aims to investigate the procedures that need to be changed or introduced in the company Bror Tonsjö AB’s existing management system in order for them to be certified in ISO 9001:2015 and ISO 14001:2015. The objective is also to make suggestions on procedures that can be integrated to the company to implement an integrated management system.

    In order to achieve the objectives a Gap Analysis was performed to get an overview of Bror Tonsjös current situation. The input for the Gap Analysis consisted of a comparison between the standards ISO 9001:2015 respectively ISO 14001:2015 against ISO 9001:2015 respectively ISO 14001:2004. The compared requirements were then checked against Bror Tonsjö’s management system. The Gap Analysis resulted in identification of the extent of the gaps in the company’s management system.

    The largest and most critical gap involved the organizations preconditions which included that Bror Tonsjö in the current situation doesn’t have a detailed documentation regarding the extent and requirements needed to meet the requirements of ISO 9001:2015 and ISO 14001:2015. The new editions of ISO 9001 and ISO 14001 also directs focus on risk-based thinking and consideration of the risks and opportunities in the design of management systems. The result is that the company also received a large gap regarding the risk-based thinking and the risks and opportunities in the planning of the management systems.

    The presented solutions should close all the identified gaps. As regards to the gap regarding the organizations preconditions, a material is presented that contains among other things questions for an stakeholder analysis and questions about what the company offers. The material covers the requirements of both ISO 9001:2015 and ISO 14001:2015. To close the gap concerning risks Tonsjö should for example consider the implications a change could bring or if the function is preserved after the changes are made.

    Based on the presented solutions, it has also appeared that the routines from the quality and environmental management systems could be integrated into one management system. Both ISO 9001:2015 and ISO 14001:2015 are constructed in the same way. Because of the similar structure Tonsjö should be able to integrate their management systems without any major problems. To enable the integration of the management systems, Tonsjös management must be engaged and take responsibility for the management systems during the integration. It’s also important that the management engages the personnel that is affected by the integration of the management system to achieve a good result.

  • 80.
    Lindqvist, Björn
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Johansson, Victor
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Layout av arbetsstation vid nyproduktionslina: ett konceptförslag till IAC Group AB2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is performed at International Automotive Components (IAC) Group located in Färgelanda, Sweden. The purpose of the work is to propose a layout of a workstation in a new production line that will be launched in autumn 2017. A layout means physical location of the components in the station. The parts produced by this production line are details of a roof shelf which is part of the interior of a Swedish leading truck manufacturer. During the project, the production line is currently being assembled and some test series is run.The work station that this thesis deals with is a welding operation of the lids before transported to a final assembly. Because the lids are manufactured in different models, the weld needs replacement of tools in order to process the current part. Different assembly tables also needs to be replaced depending on the model of the lid witch is to be manufactured.

    The work station needs to effectively have a flow of material, while the operators must have an ergonomically designed workplace, and that requires a carefully thought out layout. The process of preparation of this layout was done with methods of product development where concepts are generated and evaluated. The concept development process has been in consultation with the company supervisor and production. A total of six concepts were generated and they were graded and weighted in a matrix, which later led to the choosing of a basic model. After selecting the basic model were more concepts generated in a more detailed cell design. The last generated concepts were presented to the staff involved that eventually opted for a final concept when it met the requirements and preferences that were set. Part of the thesis was also to simulate the work of the operators, ensure the balancing and suggest possible improvements. The results in the report describes the final concept together with recommendations and guidelines of lean production.The actual implementation of the layout will be done by the company themselves.

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  • 81.
    Lindström, David
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Evaluation of a Surrogate Based Method for Global Optimization2015In: International Journal of Computer, Electrical, Automation, Control and Information Engineering, E-ISSN 1307-6892, Vol. 9, no 7, p. 1636-1642Article in journal (Refereed)
    Abstract [en]

    We evaluate the performance of a numerical method for global optimization of expensive functions. The method is using a response surface to guide the search for the global optimum. This metamodel could be based on radial basis functions, kriging, or a combination of different models. We discuss how to set the cyclic parameters of the optimization method to get a balance between local and global search. We also discuss the eventual problem with Runge oscillations in the response surface.

  • 82.
    Lindström, David
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Eriksson, Kenneth
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    A surrogate model based global optimization method2008In: 38th International Conference on Computers and Industrial Engineering 2008, 2008, p. 226-232Conference paper (Refereed)
    Abstract [en]

    A new surrogate model based algorithm for global optimization is derived. A metamodel such as a kriging model or a radial basis function model is used to build an interpolant of the objective function. Evaluation points are chosen in such a way that local search and global exploration is balanced. Instead of putting the next point exactly where it is most likely to find the global optimum, the new method also prepares for steps to come by minimizing the total uncertainty of the interpolated function within the most interesting areas of the search space.

  • 83.
    Liu, Yuan
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Effect of CNC axis movement on the surface roughness in milling2015Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this paper, the performance of a new measurement system CITE (CNC Integrity Tracing Equipment) is investigated. CITE measurement system is the name given to the data acquisition hardware and software developed by University West for recording the movements of CNC machine tools. It can be used for monitoring of the milling process and recording the milling errors. The aim of this study is investigate the capability of the CITE system in prediction of the surface roughness. In an example cutting test, the CITE measurement system was used for recording selected sections in straight milling process and curved milling process. After that, surface roughness, predicted by the CITE measurement system, was compared with the CMM (Coordinate measurement machine). The investigation shows that the CITE measurement system is comparable to the CMM for evaluation of roughness in curved sections. In straight sections, the evaluation of roughness by CMM machine is close to the simulation values that predicts surface roughness considering tool run-out.

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  • 84.
    Lugnberg, Mattias
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Netz, Tobias
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Investigation of thermal spring back of a hot formed 22MnB5 A-pillar with tailored properties2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In a world where fuel economy and crash safety is becoming an important factor in the automotive industry, the need for materials with very high strength-to-weight ratio is growing rapidly. One of the materials used for this purpose is the boron steel 22MnB5. Since the material has very high mechanical yield limit it is hard to produce parts using cold forming, which is the standard procedure for sheet metal forming. Therefore, the use of hot stamping is increasing. Hot stamping enables manufacturing of boron steel parts with good dimensional accuracy and low spring back. However, some amount of spring back is still present during the process.

    In this thesis, spring back of a hot formed 22MnB5 A-pillar is investigated using computer simulations in the software LS-DYNA. The main focus was to develop a process for simulating spring back in hot stamping.

    The work started with simulations of the forming and quenching stages of the hot stamping process, both on a full size and on a smaller section of the blank. Simultaneously as the simulations, a literature study was also conducted. The literature study was aimed at finding hints and information on how to build the simulations. Furthermore, interviews were made with experts on both LS-DYNA and hot stamping.

    A process for spring back evaluation was then created and written as an LS-DYNA keywordfile.

    In the developed spring back simulation, the part is taken out of the press right after the quenching is finished and placed in a space where it can cool and move freely. The simulation is conducted until the part reaches room temperature.

    After the quenching is done, data containing temperatures, stresses and strains of the part is exported. This data is then included in the spring back simulation where the part is cooled to room temperature. During the cooling, the stresses, strains and temperatures are equalized until the spring back reaches a steady state.

    The results indicate that the developed method for spring back evaluation can be used to foresee shape deviations for the intended part and process.

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  • 85.
    Lund, Andreas
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Utveckling av hydrauliktestutrustningskoncept för Rolls-Royce och Bentley2016Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This document is my bachelor’s thesis at The University West, Trollhättan, Sweden. The project is made as a part of a product development process in cooperation with Rohdins Automobile Service AB, Trollhättan, Sweden. The company’s speciality is service, repairs and renovations of Rolls-Royce and Bentley motor cars. Some of the most common cars in the workshop is Rolls-Royce Silver Shadow and Bentley T-series. These cars have a relatively advanced hydraulic height control system and the purpose is to keep the height of the car constant, independent of load conditions.

    Malfunction in the height control system is a fairly common problem and can result in reduced brake capacity. Present methods for fault diagnosis will often be time consuming and there is a demand for a more efficient way. Therefore, a concept for a hydraulic test equipment has been developed.

    The most important parts of the development process are research, identify needs, concept development and presentation. The concept will make it possible to test all height control components. The test equipment can also be connected to the car to test the complete height control system. The principal function builds on pressurizing hydraulic components to measure flow- and pressure characteristics. All components in the height control system has their own specific values of flow and pressure, which makes it possible to indicate the condition. The test equipment is electrically driven and is intended to be used in the workshop. It is possible to upgrade the product with a software based control system, so that automatic test programs can be used.

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  • 86.
    Lundgren, Kristoffer
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    "Fåglar i vägen": En studie av åtgärder för minskning av olycksrisk för kollision med fåglar på flygplatser2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Kollisioner mellan flygplan och fåglar har inträffat i över 100 år och den första kollisionen med dödlig utgång skedde 1912. Den ökande flygtrafiken sedan början på 1900-talet har lett till allt fler kollisioner och dödsfallen inom civilflyget var mellan 1988-2015 över 200 människor. Förutom dödsfall orsakar kollisioner dyra reparationer, uppskattat till 1.2-4 miljoner dollar, samt förseningar för resenärer.Syftet med studien är att presentera lösningsförslag för att minska risken för kollision mellan flygplan och fåglar vid Trollhättan Vänersborg flygplats. Minskar fågellivet kring flygplatsen bidrar det till att skapa en säkrare miljö för resenärerna samt en säkrare arbetsplats för flyg och markpersonalen.För denna studie valdes aktionsforskning som metod. Metoden har likheter med fallstudier och kartläggningar som inleds på liknande vis. Studien är i huvudsak kvantitativ med några få inslag av kvalitativ art.För att systematiskt förstå och sätta sig in i problematiken tillämpades Sex Sigma verktyget DMAIC, som med hjälp av litteraturstudier, samt intervjuer skapade en god grund för det fortsatta arbetet. Datainsamlingen analyserades och viktades ut efter kravspecifikationen för att ta fram de lämpligaste lösningsförslagen åt Trollhättan Vänersborgs flygplats AB. Det visade sig att förslag som högre gräs kring landningsbanan och att skapa en näringsfattig miljö var de två lösningsförslagen som fick högst betyg. De två förslagen har visat sig synnerligen effektiva på andra flygplatser och dessa i kombination med en list kring landningsbanan är de lösningsförslag som anses mest lämpliga för Trollhättan Vänersborgs flygplats AB.

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  • 87.
    Lundmark, Julia
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Magnusson, Sofia
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Kartläggning för en effektivare pallanvändning: En studie genomförd på AkzoNobel Surface Chemistry AB2017Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Due to requirements from AkzoNobels customers regarding that a certain proportion of the products life must remain when delivered, and that the products has to be delivered on a special type of pallet, have created different type of problems. The company follows a principle called the full-pallet principle which means that they want to deliver full pallets as far as possible. The requirements from the company and the customer are contradictory and require a solution. To meet both of the requirements the company needs to create a clear picture of the customer's order frequency, in which extend the full-pallet principle is applied and how many packs of each product that will fit on each pallet variants. The aim of the thesis is to identify areas of improvements within the company's order processing and generating a document on which products each customer buys, and how many packages that fits on each pallet. The thesis is a development of recommendations from a previous study. Books and articles in various topics were analysed to create a theoretical framework for the thesis. Continued data collection were preformed through interviews and analysis of data from the company's ERP-system. A description of the company's current situation has been created, including description of the company's customer order process and which types of packaging and pallets that are used for deliveries. The data from the ERP-system (Enterprise Resource Planning system) were analyzed and reported in form of charts and tables regarding the company's delivery capabilities, customer distribution and supply patterns. After analyzing the company's current situation four focus areas for improvement have been identified. The first focus area is that the company should focus on reviewing their reporting management in order to obtain accurate data regarding pallet usage. Furthermore should the company analyze its distributors in order to maximize the fullness of their pallet usage. The third focus area is that customers who only order with a low order frequency, and with low purchase quantities rather should order directly from distributors. Finally, the top ten customers with the highest potential for improvement were identified. With continuous work on the identified focus areas, the company should achieve an improvement in the percentage of incomplete pallets by a third.

  • 88.
    Lycke, Liselott
    et al.
    University West, Department of Engineering Science.
    Tano, Ingrid
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Building Quality Culture in Higher Education2016In: Proceedings of the 19th QMOD-ICQSS Conference, International Conference on Quality and Service Sciences, September 21-23, pp. 939-952, Rome, Italy. / [ed] Su Mi Dahlgaard-Park, Dr. Prof., Lund University & Jens J. Dahlgaard, Dr. Prof,. Linkoping University, Lund: Lund University Library Press , 2016, p. 939-952Conference paper (Refereed)
    Abstract [en]

    Purpose - Describe an approach to build a quality culture within a Higher Education InstitutionMethodology/Approach Case study

    Findings - We show the result of the mapped processes of a Higher Education Institution; Management planning and control, Education, Research and Support, and describe how the mapping was performed, working in cross functional teams. Further on we discuss the result ofthe pilot and the plan for implementation.

    Originality/Value of paper - A process-oriented approach in a Higher education institutions, with its complexity, creates opportunities for successful quality assurance and control when having an integrated quality assurance system.

  • 89.
    Lycke, Liselott
    et al.
    University West, Department of Engineering Science.
    Tano, Ingrid
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Kvalitetskultur och lärande organisation genom AIL2016In: ViLär 2016, konferens 8-9 december 2016, Vänersborg / [ed] Kristina Johansson, Trollhättan: Högskolan Väst , 2016Conference paper (Other academic)
    Abstract [sv]

    Under de senaste decennierna har offentlig sektor pressats att öka effektiviteten, minska kostnaderna och förbättra kvaliteten, bl.a. genom påverkan från New Public Management (NPM). Detta innebär bland annat ökad marknads¬orientering, ökad konkurrens, kundfokus, förbättrad service, decentralisering, större kontroll och ökat fokus på ledarskap (Thylefors, 2016).Universiteten är myndigheter inom den offentliga sektorn och har märkt av effektiviseringskraven och kostnadsjakten. Lärosäten är komplexa professionella organisationer där högutbildade personer arbetar självständigt och styr sitt eget arbete. Det innebär att beslutsfattandet ofta är decentraliserat och att ledarskapet ofta är svagt. Konsekvensen blir organisationer som är svåra att förändra (Mintzberg, 1989).Vid Högskolan Väst pågår det en innovativ process för att bygga upp en kvalitetskultur och ett hållbart, effektivt sätt att arbeta. Syftet är bl.a. kostnadsreducering och effektivisering genom förenkling och transparens. Projektet startade hösten 2014 och ett omfattande arbete med att identifiera och kartlägga processer pågår. Under processkartläggningen deltar medarbetare från olika områden och funktioner inom hela högskolan och hänsyn har tagits till kompetens och personliga kunskaper och erfarenheter.Genom regelbundna träffar i workshop har deltagarna bidragit med personliga och organisatoriska kunskaper när processerna kartlagts. Arbetssättet som använts är AIL-modellen beskriven av Eriksson (Eriksson, 2015). Modellen är ett arbetssätt där teoribaserad kunskap och erfarenhet bearbetas genom produktiv reflektion. Reflektionen utvecklar nytt, djupare lärande som inte¬greras i det pågående arbetet. Bearbetandet av nytt lärande och erfarenhetsba¬serad kunskap bidrar till att ny, djupare, kunskap utvecklas. Denna nya kunskap kan i sin tur integreras i arbetet och blir ny kompetens för deltagarna.Under kartläggningen har komplexiteten i lärosätets verksamhet blivit tydlig och resulterar i en gemensam bild, vilket bidragit till att skapa en helhetssyn genom ökad förståelse för hur detaljerna samverkar. Författarna, som båda varit involverade i projektet i olika grad, har genom sina kunskaper, erfarenheter och roller inom lärosätet insett att projektet kan bidra till ett nytt sätt att arbeta som integrerar kvalitetsarbetet i det dagliga arbetet. Processkartläggningen skapar förutsättningar för att t.ex. integrera kvalitetssäkringssystemet för utbildning på ett tydligt sätt. Författarna är just nu involverade i det arbetet. Arbetssättet och det breda deltagandet har bidragit till stort engagemang och skapar goda förutsättningar för ett nytt processorienterat synsätt där förståelse för verksamhetens processer och komplexitet underlättas. Detta ger i sin tur förutsättningar för att bygga en lärande organisation med tydlig kvalitetskultur.

  • 90.
    Macak, Damir
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Stanisic, Daniel
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Optimering av logistiken för TT3 Topp modulerna på Uddevalla Finmekanik AB2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    During the spring of 2015 a project was executed at Uddevalla Finmekanik AB, abbreviated UFAB. The mission was to optimize the logistics for two modules. The purpose of the study was to examine and map the company's internal material- and information flow for the modules TT3 Fill and TT3 Carton. The target was to identify causes to the varying throughput at the mounting stage. The writers of the study should present solutions for the problem to optimize the flow. For examine and mapping the material- and information flow for the modules, observations and interviews were performed with the staff in mounting, picking, goods receipt, purchase and preparation.

    By the data collection several flaws was identified. Analyze showed that the push flow and operations in goods receipt was two main areas that caused varied throughput time in mounting. Wrong inventory, no structure in stock and unnecessary work was some of the flaws caused by the operations in goods receipt and the push flow. The writers of the study proposed a solution that would mean implementing a pull flow with kanban. To describe the solution the writers worked with three questions at issue, how should the Kanban system be formed, what does the production require before implementing kanban and how should UFAB begin implementing kanban? By the questions of issue the writers of the study presented possible working and the advantages kanban brings to UFAB. The study is mainly describing which flaws that are fixed by implementing Kanban. The proposed solution will minimize the material shortage that is occurred by the montage which in turn results in even out the through put time in mounting.

  • 91.
    Nilsson, Daniel
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    G-Code to RAPID translator for Robot-Studio2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the emerging development of new technology and the constantly falling prices, more companies will find interest in industrial robots. Until today, the typical robot users have been large scale car manufacturers. But there exists a big potential market within the small to medium businesses that already uses of CNC machines. Attracting smaller businesses to start using industrial robots could open up the doors to new possibilities and increase their production. Unfortunately, most people still lack the knowledge of operating and programming industrial robots. But many companies have knowledge in G-code which is normally used in CNC machines. That is why this work is focussing on the development of a software that opens up the possibility to make use of G-code to program advanced robot paths with minimal user input. By striving for easier handling of robots, the vision about a more efficient and automated society will become one step closer. The introduction straightens out the different basic principles of CNC milling machines and robots. This will introduce the reader and highlight the different similarities and differences that exist between robots and CNC mills. The goal of this work has been to create an add-in application for ABB’s off-line programming software RobotStudio that was able to import at least one type of file format commonly used for CNC milling. The program should be able to handle some basic functionality, the focus has been on the standard iso6983 type of G-code. The project started with a literature study that gave the author a better insight in both the previous research within the area but also deeper knowledge of the systems CNC mills and robots. The work continued with the development of a software able to import the specified file format. The software has been built in C# and is built as an add-in software for ABB’s offline programming software RobotStudio. The result presents a software that is able to read different types of G-code and translate them into generated paths in RobotStudio. The software also has an inbuilt function in order to parameterize the G02 and G03 commands that represent curves in G-code into straight line segments of the type MoveL in RobotStudio.

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  • 92.
    Nilsson, Emmy
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Andreasson, Gwendelines
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Åtgärdsförslag till Sansera Sweden AB för att uppfylla kraven i kvalitetsstandarderna ISO 9001:2015 och IATF 16949:20162017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this thesis, a Gap Analysis has been performed to find out how Sansera's quality management system meets the new requirements in the standards ISO 9001:2015 and IATF 16949:2016. The aim of the thesis is to make suggestions for actions that Sansera needs to take in their current quality management system in order to be certified according to the latest standards. In the Gap Analysis that was established, the standards ISO 9001:2015 and IATF 16949:2016 were compared to the previous standard ISO/TS 16949:2009 to find out what requirements are new. The requirements were then compared with Sansera's quality management system to identify the company's current situation. Based on the results of the Gap Analysis, the extent of the gaps was identified in Sansera's quality management system. In the study a benchmarking was performed against a company with similar processes like Sansera. The benchmarking was performed to verify if the methodology in this study is appropriate for its aim. The result of the benchmarking confirmed that the methodology used in the study is appropriate. Several of the requirements in the standards ISO 9001:2015 and IATF 16949:2016 requires that there should be documented information for the process that the requirement covers. The result of the Gap Analysis showed that a recurring reason for several of the gaps was that Sansera did not have the documented information for its processes required by ISO 9001:2015 and IATF:2016. Requirement 4.2.2 proved to be the most critical requirement because it can only be fulfilled if all other requirements containing requirements for documented information are fulfilled. In the study the suggestions for actions are presented to the gaps in Sansera's quality management system which is fulfilled by half, small part or not at all. The suggestions for actions are considered to be able to close the gaps in Sansera's quality management system. In order for Sansera to fulfill the gap regarding the lack of documented information, the company is recommended to update their current document management system, it is assumed to facilitate the introduction of the suggested procedures regarding documented information.   

  • 93.
    Nilsson, Galina
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Luchinskaya, Elena
    Leeds Beckett University, Lancaster University, United Kingdom.
    Kristiansson, Lilia
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Enhancing Students' Performance In Maths Through Supplemental Instruction2016Conference paper (Other academic)
  • 94.
    Nourozi, Benjamin
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Ogemark, Freddie
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Undersökning av SafetyEYE för interaktion mellan människa och robot i ett mindre riskområde2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis examined if SafetyEYE is safe and reliable for human-robot interaction in a smaller area of risk. In today's industry sought flexible solutions to make the robot safe as this is now done by having a solid barrier around the robot, which prevents the flexibility of human-robot interaction. To eliminate the need of a solid barrier there is a system named SafetyEYE.

    SafetyEYE is a camera system that enables three-dimensional zone monitoring where neither human nor robot must be in the zones while the robot is operating in automatic mode.

    The purpose of this study is to examine the system's resolution, sensitivity and sensitivity to reflections in a smaller risk area of 3.8 m x 2.8 m, as the system proved to be over sensitive to reflections from reflective objects in a greater risk area in a previous work. Some other purpose of this study is to examine what the ISO standards say on the application of a system like SafetyEYE and acquire knowledge about other methods and safety systems that enable a safe HRI (Human-Robot Interaction).

    The aim of this study is to examine if SafetyEYE is safe and reliable for monitoring a smaller risk area.

    The results of dissolution experiments showed that the system can detect objects down to 2 mm in width at a distance of 3.05 meters from the camera and with an illuminance of 315 lux in the experiment area. Furthermore, the results of the sensitivity experiments showed that the system was over-sensitive when the illuminance was 15 lux and 4000 lux in the experiment area. Regarding the result of reflection experiments showed that the system was reflection sensitive when two lamps with an illuminance of 4000 lux were directed against a reflective metal and a mobile. Four ISO standards found that covered the area of application of SafetyEYE. These ISO standards covering subareas: Stop function, requirements for an HRI area, the level of performance and safety distance. Furthermore, the results of the literature review of methods and safety systems for enabling a safe HRI showed that there are similar systems like SafetyEYE.

    Conclusions were that the system is not reliable in terms of light and reflection sensitivity when used for monitoring a smaller risk area, but can be used in a work environment that is adapted to the system, such as the illuminance does not change and the floor does not reflect. After the study of the ISO standards could be concluded that it is possible to implement SafetyEYE in a robot cell according to ISO requirements.

  • 95.
    Nystedt, Patrik
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Fuzzy crossed product algebras2015In: Annals of Fuzzy Mathematics and Informatics, ISSN 2093-9310, E-ISSN 2287-6235, Vol. 10, no 6, p. 959-969Article in journal (Refereed)
    Abstract [en]

    We introduce fuzzy groupoid graded rings and, as a par-ticular case, fuzzy crossed product algebras. We show that there is abijection between the set of fuzzy graded is omorphism equivalence classes of fuzzy crossed product algebras and the associated second cohomology group. This generalizes a classical result for crossed product algebras to thefuzzy situation. Thereby, we quantize the difference of richness between the fuzzy and the crisp case. We give several examples showing that in the fuzzy case the associated second cohomology group is much ner than in the classical situation. In particular, we show that the cohomology group may by in nite in the fuzzy case even though it is trivial in the crisp case.

  • 96.
    Nystedt, Patrik
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Oinert, Johan
    Lund Univ, Ctr Math Sci, SE-22100 Lund, Sweden.
    Simple semigroup graded rings2015In: Journal of Algebra and its Applications, ISSN 0219-4988, E-ISSN 1793-6829, Vol. 14, no 7Article in journal (Refereed)
    Abstract [en]

    We show that if R is a, not necessarily unital, ring graded by a semigroup G equipped with an idempotent e such that G is cancellative at e, the nonzero elements of eGe form a hypercentral group and R-e has a nonzero idempotent f, then R is simple if and only if it is graded simple and the center of the corner subring fR(eGe)f is a field. This is a generalization of a result of Jespers’ on the simplicity of a unital ring graded by a hypercentral group. We apply our result to partial skew group rings and obtain necessary and sufficient conditions for the simplicity of a, not necessarily unital, partial skew group ring by a hypercentral group. Thereby, we generalize a very recent result of Goncalves’. We also point out how Jespers’ result immediately implies a generalization of a simplicity result, recently obtained by Baraviera, Cortes and Soares, for crossed products by twisted partial actions.

  • 97.
    Nystedt, Patrik
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Öinert, Johan
    Lund University, Centre for Mathematical Sciences.
    Outer Partial Actions and Partial Skew Group Rings2015In: Canadian Journal of Mathematics - Journal Canadien de Mathematiques, ISSN 0008-414X, E-ISSN 1496-4279, Vol. 67, no 5, p. 1144-1160Article in journal (Refereed)
    Abstract [en]

    We extend the classicial notion of an outer action α of a group G on a unital ring A to the case when α is a partial action on ideals, all of which have local units. We show that if α is an outer partial action of an abelian group G, then its associated partial skew group ring A⋆αG is simple if and only if A is G-simple. This result is applied to partial skew group rings associated with two different types of partial dynamical systems.

  • 98.
    Nyström, Joakim
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Kartläggning och analys av internt informationsflöde2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The thesis describes a conducted study at a manufacturing company in the plastic industry. The study was supposed to create a flow chart for the information flow from customer order to delivery. The formulated objectives of the study was to create an overall process mapping, identify problems and making suggestions for improvement. The author started the study by studying theory to create a basic understanding of the field. In order to collect information for the study the author conducted interviews with the company´s employees and handed out a questionnaire. The collected theory from the study and gathered data made it possible for the author to create a comprehensive process mapping of the information flow. The data collection also contributed to the identification of problems for study.

    By analyzing the process mapping the author identified a control that contributed to increased waste and reduced efficiency in the flow. The collected problems that were identified during the study helped to author analyzed that the problems really were disturbances of the normal flow. These disturbances were due to internal and external variety and flexibility, which contributed to an increased flow of information.

    The improvement suggestions that the study has resulted in is that the company should use the process mapping to convey knowledge of the flow and try to eliminate the unnecessary control, mapping the frequency of disturbances and review the communication method of interference. The company is also recommended to create a more detailed value stream analysis of the flow, in order to identify more wastage.

  • 99.
    Olsson, Ida
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Petersson, Josefine
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    3D Models with Product and Manufacturing Information: A step towards Model Based Engineering2015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis work has been performed at GKN Aerospace Sweden AB.

    The objective was to initiate GKN Aerospace Engine System (GAES) work towards Model Based Engineering (MBE); letting the 3D models including Product and Manufacturing Information (PMI) replace the 2D drawings as the authoritative information source.

    To obtain the objective a pilot-study was performed. The pilot-study implied taking a 3D model including PMI through the downstream information flow at the company, to identify opportunities and challenges with this way of working.

    Requirements and aspects were identified to describe what need to be tested and answered during the pilot-study. Concurrent with the pilot-study the ranked list of requirements was followed-up and the identified aspects were answered. Out of 19 requirements the result showed that nine requirements are fully met with the current work approach, seven requirements are partly met and three requirements are not met. Since a major part of the requirements is fully met it will simplify GAES step in the direction towards MBE.

    The study showed that introducing MBE can imply both opportunities and challenges for GAES. One opportunity is that MBE can minimize errors when less human interpretation is needed. A challenge is that GAES way of working differs from other companies, which requires a new way of thinking and different functionality in software. There is today no solution for tracking changes in the 3D model including PMI, which needs to be solved before a transition.

    The employees believe that introducing MBE will lead to a big readjustment and that the cultural change at the company will be the biggest and most difficult challenge to overcome.

    Since the approach to work with MBE is still not as widespread within the aerospace industry, there are several aspects that need to be explored and studied further.

  • 100.
    Quincoses, Annette
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Andersson, Malin
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Tidseffektivisering av inköpsprocessen på Mape Sweden AB2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This Bachelor's Thesis has been performed at Mape Sweden AB with the purpose of elimi-nate or reduce the non-value adding activities within the purchasing process. By examining the company's purchasing process for tools and spare parts, the goal is to find solutions that will entail time-efficiency in the purchasing process.

    The work in this thesis is of qualitative nature. This approach was chosen to obtain an un-derstanding of the current situation with qualitative methods. To collect data the group per-formed several observations and interviews, literature reviews and a benchmarking at a dif-ferent manufacturing company. To develop proposals for improvements to the company, a spaghetti diagram was conducted tracking all movements at goods-withdrawal and goods-receipt. A time study was conducted to compare the times before and after implementation of improvement proposals.

    The current situation analysis showed that purchases are made by different people resulting in that there is not a standardized approach. Spaghetti diagram of movements in goods-withdrawal and goods-receipt showed that there is numerous movements and some of them are unnecessary. Proposals for improvements was conducted based on the information from current situation analysis together with information obtained from benchmarking. The pro-posal for goods-withdrawal was that the workers themselves enter goods-withdrawal in the SAP-system. The proposals for goods-reception was to receive the goods once a day, place a shelf for non-stocked tools and a shelf for supplies in the tool shed as well as making demands on suppliers to always have the part number and stock location on the packing slip included with all deliveries.

    .When implementing the groups proposed improvements, the total time spent on goods-receiving and goods-withdrawal was reduced from 6 hours, 40 minutes and 23 seconds to 1 hour and 58 minutes, which represents a decrease of 70%.

    For future work the group recommend that the improvement proposals also be implemented on other types of purchases within the company and that the company further investigate the benefits of tool cabinet and scan-ning systems.

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