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  • 1.
    Abrahamsson, Sten
    et al.
    Gotland University.
    Tosteby, Jonas
    University West, Department of Engineering Science, Division of Process and Product Development.
    Isaksson, Raine
    Gotland University.
    Integrated Management Systems: testing a model for integration2011In: 14th Toulon-Verona Conference: Organizational Excellence in Service. Conference Proceedings / [ed] Jacques Martin & Claudio Baccarani., Alicante: University of Alicante , 2011, p. 22-35Conference paper (Refereed)
    Abstract [en]

    Management systems are widely used for creating order, minimising risks and for assuring performance. Management systems are in many occasions integrated since this has been found to be beneficial. In this paper a model for a fully integrated management system (IMS) based on the three axes of level, extent and scope of integration is tested for relevance. The studied system permits the integration of all relevant process dimensions. The research is only in a pilot stage, but the initial results are promising and indicate that there are advantages in using the process view as a base for identifying critical aspects to be managed. A review of the current situation for system integration is studied and the model is subjected to some tests using Sweden as a case. The background study shows that system integration still is limited, especially when comparing with a fully integrated IMS. The feedback from the organisations interviewed is positive and supports continued work with development of the model.

  • 2.
    Choquet, Isabelle
    et al.
    University West, Department of Engineering Science, Division of Manufacturing Processes.
    Björklund, Stefan
    University West, Department of Engineering Science, Division of Manufacturing Processes.
    Johansson, Jimmy
    Volvo Aero Corporation, Trollhättan.
    Wigren, Jan
    Volvo Aero Corporation, Trollhättan.
    Clogging and lump formation during atmospheric plasma spraying with powder injection downstream the plasma gun2007In: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 16, no 4, p. 512-523Article in journal (Refereed)
    Abstract [en]

    This study aimed to numerically and experimentally investigate lump formation during atmospheric plasma spraying with powder injection downstream the plasma gun exit. A first set of investigations was focused on the location and orientation of the powder port injector. It turned out impossible to keep the coating quality while avoiding lumps by simply moving the powder injector. A new geometry of the powder port ring holder was designed and optimized to prevent nozzle clogging, and lump formation using a gas screen. This solution was successfully tested for applications with Ni-5wt.%Al and ZrO2-7wt.%Y2O3 powders used in production. The possible secondary effect of plasma jet shrouding by the gas screen, and its consequence on powder particles prior to impact was also studied.

  • 3.
    Choquet, Isabelle
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Mechanical Engineering.
    Degond, Pierre
    Universit´e Paul Sabatier, Mathématiques pour l’Industrie et la Physique.
    Lucquin-Desreux, Brigitte
    Universit´e Pierre et Marie Curie-Paris 6, Laboratoire Jacques-Louis Lions.
    A hierarchy of diffusion models for partially ionized plasmas2007In: Discrete and continuous dynamical systems. Series B, ISSN 1531-3492, E-ISSN 1553-524X, Vol. 8, no 2, p. 735-772Article in journal (Refereed)
    Abstract [en]

    Partially ionized plasmas corresponding to different ionization degrees are derived and connected one with each other by the diffusion approximation methodology. These plasmas are the following electrical discharges:a thermal arc discharge, glow discharges in local thermodynamic equilibrium -LTE- and in non-LTE, and a non-LTE glow discharge interacting with an electron beam (or flow)

  • 4.
    Choquet, Isabelle
    et al.
    University West, Department of Engineering Science, Division of Production Engineering.
    Degond, Pierre
    Universit´e Paul Sabatier, Mathématiques pour l’Industrie et la Physique.
    Lucquin-Desreux, Brigitte
    Universit´e Pierre et Marie Curie-Paris 6, Laboratoire Jacques-Louis Lions.
    A strong ionization model in plasma physics2009In: Mathematical and Computer Modelling, Vol. 49, no 1-2, p. 88-113Article in journal (Refereed)
  • 5.
    Ericson Öberg, Anna
    et al.
    Chalmers Tekniska Högskola.
    Hammersberg, Peter
    Chalmers Tekniska Högskola.
    Svensson, Lars-Erik
    University West, Department of Engineering Science, Division of Mechanical Engineering.
    The right evaluation method - an enabler for process improvement2013Conference paper (Other academic)
    Abstract [en]

    This paper aims at describing the procedure where an alternative evaluation process was developed to support the improvement of both welding and weld quality evaluation. Welded structures are important when striving for reduced fuel consumption due to vehicle weight. Hence good control of the fabrication process is critical to keep welding performance on target, avoiding waste in terms of added weight and overproduction. The resulting distribution of weld weight has shown to be an important control parameter in the sense of keeping cost down.

    To identify the causes for deviations between actual and theoretical weld weight, information about the weld was needed. The currently used evaluation method showed not to be capable of giving the information needed. It was necessary to know the throat size as well as weld geometry. The current evaluation method introduced more variation due to the measurement than the actual fabrication process itself, leading to drift of process target and overproduction.

    To fulfil the need of information, that different functions within the company had, a PULL-approach was used. The information need, information presentation and sequence were outlined for each information receiver individually. An alternative measurement method was developed and named WIA – Weld Impression Analysis. The method consists of two parts; creating the replica and analysing the shape in an image analysis program.

    The method was tested to see if it was capable of delivering accurate and precise measurements, satisfying repeatability and reproducibility requirements for this particular situation. A thorough measurement system analysis was carried out. The measurement system assigned 98.98% of the total variation to part-to-part variation corresponding to long-term process variation. The variation that stems from taking the impressions and preparing them was as well investigated, also showing satisfying results. Finally it was investigated if the impressions reflect the true shape of the welds accurately. The results showed a tendency of slightly higher cross sectional areas in the range of 0-3 %. This however indicated that the accuracy of the measurement system was sufficient for its purpose.

    The PULL-approach generated a sufficient method which enabled the possibility to perform process improvement and gain large production cost savings.

  • 6.
    Fasth, Angelica
    et al.
    University West, Department of Engineering Science, Division of Production Engineering.
    Nylen, Per
    University West, Department of Engineering Science, Division of Production Engineering.
    Choi, B.
    Center for Theraml Spray Research, Stony Brook, New York.
    Klement, Uta
    Chalmers University.
    A Comparative studey of Mechanical Properties Between HVOF-spryed Maxphase Materials and Plasma Sprayed MCrAIY Coatings2009In: Surface Modification Technologies XXII: Proceedings of the Twenty Second International Conference on Surface Modification Technologies Held at University West, Trollhättan, Sweden September 22-24 2008 / [ed] T.S. Sudarshan & Per Nylen, VALAR Docs , 2009, p. 149-156Conference paper (Other academic)
  • 7.
    Hallström, Kristoffer
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Olofsson, Björn
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Förslag på utformning av en monteringscell för att öka produktionskapaciteten: för VP1-pumpar på Parker Hannifin AB2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This work has been carried out at Parker Hannifin in Trollhättan and is describing concept work for design proposals of an assembly cell in which a hydraulic pump is produced. The current assembly cell does not have a high enough capacity to meet a rising demand. The aim of this work was to propose a balanced assembly cell whose capacity increases with increase in the workforce. The goal was to present a model of an assembly cell that can achieve a production capacity of at least 200 pumps per week.By observing the current assembly, and study the various operations time duration, different time balancing charts were created. Unlike the current time balancing charts the operations for calibrating and controlling the pumps functions in a test rig were now included. Various concepts were created and discussed with stakeholders and were followed by revisions of the concepts before a screening. The concepts were screened down to two concepts, which were modeled in full scale to allow for evaluation according to the working method Production Preparation, 2P. After that, a concept point matrix was created and the concepts were rated with the use of the evaluation of the models.The concept recommended to Parker is called "Two-sided assembly" and is a concept where the majority of the sub-assemblies for building a VP1 pump is made on one side and then transported on a roller conveyor to the other side where a smaller amount of sub-assemblies is made to be followed by the final assembly.The concept with the examples of time balancing charts results in a production capacity of 227 pumps per week. The concept is flexible and can be adapted to several workflow standards and there is potential for further development if the concept is deemed suitable to implement by Parker.

  • 8.
    Hansson, Jonas
    et al.
    University West, Department of Engineering Science, Division of Process and Product Development.
    Klefsjö, Bengt
    Luleå University of Technology, Division of Quality and Environmental Management.
    Sustaining quality management implementation in small organisations: Experiences from quality award recipients2008In: International Journal of Management Practice, ISSN 1477-9064, Vol. 3, no 1, p. 31-50Article in journal (Refereed)
  • 9.
    Jiang, Janna
    et al.
    University West, Department of Engineering Science, Division of Production Engineering.
    Fasth, Angelica
    University West, Department of Engineering Science, Division of Production Engineering.
    Nylén, Per
    University West, Department of Engineering Science, Division of Production Engineering.
    Choi, W. B.
    Center for Thermal Spray Research, Stony Brook, NY, United States.
    Microindentation and inverse analysis to characterize elastic-plastic properties for thermal sprayed Ti2AlC and NiCoCrAlY2009In: Surface Modification Technologies XXII: Proceedings of the 22nd International Conference on Surface Modification Technologies SMT22 / [ed] T.S. Sudarshan & Per Nylen, VALAR Docs , 2009, Vol. 18, no 2, p. 177-186Conference paper (Refereed)
  • 10.
    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 (Online), 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.

  • 11.
    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.

  • 12.
    Lagrosen, Yvonne
    et al.
    University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering.
    Lagrosen, Stefan
    University West, Department of Economics and IT, Division of Business Administration.
    The effects of quality management, a survey of Swedish quality professionals2005In: International Journal of Operations and Production Managment, Vol. 25, no 10, p. 940-952Article in journal (Refereed)
    Abstract [en]

    Purpose – In this study, the effects of the different models and tools of quality management are examined. The purpose is to identify differences in the effects generated by different qualitymanagement models and tools.

    Design/methodology/approach – A questionnaire was mailed to 500 Swedish quality professionals. The questions concerned their companies’ adoption of the values of TQM, the use of the models and tools of TQM and the effects they notice. Correlation analysis and multiple regression analysis were carried out.

    Findings – The findings show that there is statistical correlation between the adoption of the values of TQM and successful quality management. The usefulness of the Swedish Quality Award, the European Quality Award and ISO 9000 as well as several of the quality management tools is also indicated. Regarding ISO 9000 specific effects have been found.

    Research limitations/implications – A limitation of the study is that the financial outcomes of the quality management practices are not measured but only the managers’ perceptions of effects produced. The implication for further research is an increased knowledge of the different effects of the quality management practices and the significance of the values, particularly three values that were included in the multiple regression models.

    Practical implications – The specific findings on the effects of ISO 9000 are useful for managers when implementing the standard. The results of the study also indicate the importance of emphasising the values for successful quality management.

    Originality/value – This study has provided more detailed knowledge of the effects of the differentquality management practices, particularly of ISO 9000.

  • 13.
    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.

  • 14.
    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.

  • 15.
    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.

  • 16.
    Lycke, Liselott
    et al.
    University West, Department of Engineering Science.
    Tano, Ingrid
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Building quality culture in higher education2017In: International Journal of Quality and Service Sciences, ISSN 1756-669X, E-ISSN 1756-6703, Vol. 9, no 3-4, p. 331-346Article in journal (Refereed)
    Abstract [en]

    Purpose: The purpose of this paper is to describe an approach to build a quality culture within a higher education institution. Design/methodology/approach: This paper is based on Action research and a Case study. Findings: The authors 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, they discuss the result of the pilot and the plan for implementation. Originality/value: A process-oriented approach in higher education institutions, with its complexity, creates opportunities for successful quality assurance and control when having an integrated quality assurance system. © 2017, © Emerald Publishing Limited.

  • 17.
    Markocsan, Nicolaie
    et al.
    University West, Department of Engineering Science, Division of Production Engineering.
    Nylen, Per
    University West, Department of Engineering Science, Division of Production Engineering.
    Wigren, J.
    Volvo Aero Corporation, Trollhättan, Sweden.
    Xin-Hai, Li
    Siemens Industri Turbomachinery AB, Finspång, Sweden.
    Tricoire, A.
    Volvo Aero Corporation, Trollhättan, Sweden.
    Klement, Uta
    Chalmers University.
    Yao, Y.
    Chalmers University.
    Effect of Heat Treatment on Low Conductive Thermal Barrier Coatings2009In: Surface Modification Technologies XXII: Proceedings of the Twenty Second International Conference on Surface Modification Technologies Held at University West, Trollhättan, Sweden September 22-24, 2008 / [ed] T.S. Sudarshan & Per Nylen, VALAR Docs , 2009, p. 139-147Conference paper (Refereed)
  • 18.
    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.   

  • 19.
    Sandberg, Ulf
    University West, Department of Engineering Science.
    How an Enlarged Maintenance Function Affects the Performance of Industrial Maintenance and Maintenance Services2011In: Maintenance performance measurement and management, MPMM2011: 13-14 dec, Luleå / [ed] Galar d, Parida A, Schunnesson H, Kumar U, Luleå: LTU , 2011, p. 107-112Conference paper (Refereed)
    Abstract [en]

    Today, many companies struggle with maintenance work established by pre-requisites during purchasing, installation and start-up of plants, systems and machines. In search for improvements in existing maintenance organizations, it´s easy to conclude that they look like and is a direct consequence of previous engineering decisions and activities.

       Maintenance is, however, performed in the operation phase with weak coupling to what created it. Using an empirical knowledge base, several examples of this narrow view on maintenance is given along with the consequences it results in today.

       It is argued, that the increasing need to create and preserve knowledge will be the driver for change and the main contribution to an enlarged and more efficient maintenance function. Improvements are pointed out using references to the leading actors creating the frontier today where most companies could be tomorrow. The paper hopefully will contribute to how maintenance processes and activities are being designed, set-up and carried out.

  • 20.
    Svensson, Thomas
    et al.
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Åhs, Christian
    University West, Department of Engineering Science, Division of Mechanical Engineering and Natural Sciences.
    Kartläggning av kritiska maskiners utrustningseffektivitet2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis is comprised of an investigation of equipment effectiveness at the company Produce AB (fictitious name) at two machine cells, Alfa, which consists of four millers and Beta, which consists of four lathes. The company is a subcontractor of metal products to three different business areas and consists today of 100 employees. By measuring the actual time the machinery process goods for the customer the company have identified low machine utility as a problem in the production. With this investigation, they therefore want to identify the causes of this problem in order to improve the business and become more competitive. The approach for this investigation is based on the methodology within Six Sigma where the DMAIC model has been used. Quantitative data collection occurred during ten days with the use of an operator template, where duration and cause of machine downtime was noted. Qualitatively, unstructured, semi-structured and fully structured interviews have been used to analyze the root causes for machine downtime that was identified following the quantitative data collection. The main part of the theoretical framework for this thesis includes total productive maintenance and overall equipment efficiency, which was used to map and calculate the current state of the equipment efficiency. Other theoretical frameworks are Lean, material- and production planning, resource utility and variations. These theories were used to analyze the result and give suggestions for improvement. The calculated equipment efficiency varies between both the cells and the machines within the cells. In the Alfa-cell, values vary between 52 and 80 per cent and in the Beta-cell between 37 and 57 per cent. The significant causes for machine downtime were identified as lack of personnel, long set-up times, machinery waiting for operators, differences in processing time between cycles and machine breakdowns. From this, suggestions for improvement were developed. The suggestions included employment of addition personnel, reduction of set-up times, introduction of an Andon-system and elimination of processing time differences. In general, the authors of this thesis can see that the company has a will to improve, but the work with improvements has been suffering since the production is behind, compared to what the customer demands. A lack of resources and short term-thinking are therefore considered two of the things that most affect the company's possibilities to maintain a competitive business.

  • 21.
    Örtendahl, Niklas
    University West, Department of Engineering Science.
    En studie på emballeringssystem ur ett resursoptimeringsperspektiv2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today's industry is subject to fierce competition. This requires constant business development and continuous increment in product variety to meet customer requirements. Management Tools such as Lean Production, which focuses on a continuous reduction of waste in all parts of the company, plays a key role in today's industry. In order to reconcile the continual improvement of the organization's well-being requires a structured approach in the form of organized improvements.  The work carried out at Swegon AB in Kvänum identifies possible changes concerning the wrapping process in efficiency improvement and resource saving purposes. The company produces air handling units and fans for indoor use. The products are used in stadiums, hotels, hospitals, airports, universities and private housing.  Today’s wrapping process is perceived as ineffective. The company sees potential for improvement in transportation cuts, in minimizing physical and business management steps and thus reduce the need for storage space and buffers. Along with a restructuring, that focuses on improving material flow and layouts, large parts of the production is changed, from a function-oriented to an increasingly process-oriented structure. If the proposed changes are to be implemented this most likely occurs in conjunction with the rebuilding.  The work was initiated by a comprehensive survey of today's wrapping process. The empirical collection began through interviews, observations and process mapping. The survey was completed by applying the fishbone diagram, where the root causes of the identified problems were structured.  Continuous literature studies were conducted to substantiate the used methods. The theory deals primarily with lean production with focus on waste and standardization. Suggestions for improvement were generated continuously in close cooperation with technicians and production staff. The focus was on reducing non-essential steps in the process. This work results in four proposed changes: scanning, layout changes and kitting. These changes give rise to a reduced need of resources and an increased quality towards customers. Additionally, the proposals improve opportunities for standardization of the process in the future. Date

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