In the chapter the results of research on importance of the factors determining
the 7th principle of Toyota management in the company producing the heavy plates (steel
sheet) was presented. There were presented the method of quality control during entire
production process and the results of the BOST survey were presented. The characteristic
importance rank of factors of t 7th principle of Toyota management in the research company
was following: (CS; GW; ME; UP) >TI>EP.