The purpose of the thesis is to provide SKF Logistics Services Sweden, within Customer Services and Warehousing, with an analysis of the actual process and improvement suggestions to reduce late invoicing. The objective of the thesis contain a mapping of the process, identified parameters that affect late invoicing, reduce non-value added activities and improvement proposals to keep the internal invoice deadline.According to DMAIC, which was used as a method to analyse the qualitative and quantitative data, the most broken deadlines occur to the container traffic. That became the focus of the investigation. Further analysis led to the conclusion that the orders are not packed by Warehousing on time. It was decided to address that as a main problem to improve on.Quality tools were used to find root causes and improvements. The improvements were evaluated and two main improvements were chosen. Organisational improvements on how to work with process improvements are proposed. It contain working with PDCA, standardisation, decision making and measurements. A process improvement for Warehousing are proposed which contain segmentation of articles, letting the bottleneck limit the throughput and prioritisation of assignments.