This master thesis contains the documents and the analysis of an operator's workplace in a metalworking company, with the aim to implement 5S technology. Lean management is described from a theoretical aspect, including the 7 major waste on which the lean philosophy is based upon. It also contains some of the tools used for implementing the lean production, and the 5S method, which represents one of the fundamental methods used in lean production, is elaborated in more detail. The practical part of the thesis shows the implementation of the 5S method through a process approach based on a PDCA circle. Primarily, an assessment table of the current state of production was made, and the said table is substantiated with the according photographs. This was then followed by defining the goals for each step needed to achieve it's potential, and it also presents the operator's tasks divided in processes, sub-processes and steps. For the process of switching of workpieces, a method introduction plan was made using the documents regarding the necessary and unnecessary tools, and the waste directly affected by using the 5S method were defined. Furthermore, an analysis of machine changeover time using the SMED method was presented, and a conclusion was reached in the sense that the most time is spent precisely on machine changeover time, which can be managed by buying an industrial cabinet and the necessary tools to significantly reduce the changeover times.