In order for companies to survive and stay competitive in today's market, it is very important to ensure consistency in their operations because it increases efficiency. However, because of different ways of executing the same process by different workers, due to different skill levels, education or experiences, it is hard to maintain the required consistency and that might result in variations in the produced products or services. The aim of this project is to study the creation of standardized work according to Lean, as well the training process of unskilled personnel to perform production tasks in an efficient way. This thesis will concentrate on creation of work instructions making standards of different kinds of condensers in order to have efficient work and mainly to decrease the percentage of internal and external scarps which costs the company huge amount of money every year.