The article concerns the analysis of the efficiency of the process of retooling the production line. The analyzes of preparation and implementation of production changes (serial production) are presented. The main issues of technical preparation were included in the analyzes. In addition, the investment indicators and the return of the funds involved were estimated. The work presents justification for undertaking a topic for the analyzed production system. Analyzes of the prosecutions were carried out earlier and a plan for implementing new procedures was created. The analysis of the improvement project takes into account investment opportunities as well as the time of engagement of the working group.