The goal of this thesis project was to study, which Lean management tools would suit best for enhancing the process of a CNC machine with the commissioner. The demand for this study came from the CNC machining phase being the production’s bottle neck. This project was focused on Lean thinking and its essential tools as well as on improving quality, quality and work phase performance, connected to each other.

The main issues in the CNC work phase were the machine’s poor performance, the outdated control unit and the placement of the equipment. Poor performance was caused by partial ignorance of maintenance and a lack of understanding the importance of automatized functions. The study also revealed a need for updating the CNC machining software with the commissioner. However, choosing better software was not included in to this thesis project, but needs a further study.

Small changes in the working routine have a major impact on CNC machine’s performance: reorganization of the workstation and its tools, auditing for daily and weekly maintenance and repair of automatized functions.