ERP implementation projects are wide and challenging projects that need lots of resources. The companies want to make sure that these projects succeed and the investment carries positive results. This research is made as a case study to an organization that is in predefinition phase of SAP implementation project. The research is constrained to the processes inside Materials Management module in SAP. Its first objective was to describe the current processes of the case company. The second objective was to compare the current processes of the upcoming ERP and give solution proposals for the conflicting parts. The third objective was to research why the case company has material shortages which affect the functioning quality of the current ERP. Through these three steps the overall objective could be achieved: Successful predefinition for the Materials Management module in the case organization.

The research consists of both qualitative and quantitative analysis. The quantitative part is based on data collected from the current ERP. The qualitative part of the research was based on interviews and informal discussions in multiprofessional project teams. Background material consisted of blueprint documents, process flowcharts, instructions as well as other internal material of the case company. The research can be considered as success because all of the processes were examined comparing the processes used in SAP and the conflicting processes were reported. Also solutions were found for occurred conflicts and the material shortages.