The diploma thesis is focused on the analysis of quality costs in a selected company. The work describes various methods and models of quality, but especially the cost of quality. The work is divided into a part that deals with the theoretical background and a practical part. The practical part analyzes the quality costs of the company XYZ s.r.o. using the PAF method. Based on the calculated values, we subsequently proposed corrective measures for the company using the KAIZEN method from a long-term as well as short-term perspective.