The main goal, which we wanted to show in the diploma is to reduce the own price of the product, which we achieved with lean methods. The product on which we dealt with our own price is the guide thread used in spinning machines. The production of thread guides consists of seven machining operations. With lean methods, we reduced the processing time and time for the operation, which consequently reduced the production costs that effect our own price. The result of the new own price, which was reduced by 13%, was that it increased profits by 34 %.