Without a well working organization with adequate and structured processes no product in required quality can be produced. Thus structures, processes, interface problems of the departments within the internal organization have to be managed. Further the complexity of the projects, large number of products, which have to be planned, realized, assessed and secured, must be treated in an appropriate way to assure a sustainable quality. This master thesis gives first a theoretical overview of the quality assurance- and control activities required within the supply process in plant engineering and construction. The practical part deals with the analysis of the actual situation of the planning- and inspection activities within the quality department of Sandvik located in Leoben/Austria. The self-developed optimizations, improvements of processes are described. Further the improved, transparent and user-friendly software is part of this thesis, which has been promoted together with computer programmer. Here adjustments to the process are described, considering the interfaces to departments within the supply chain. As an outlook those optimizations within the planning- and inspection process in cooperation with the developed software “QC Planning” as part of PROSQUID should be presented within all global existing Sandvik Mining production units and trained to employees of quality departments as a standard.