A distinctive feature of this publication is its purely practical focus on solving everyday problems related to the quality of production. At the same time, the minimum mathematical apparatus of the book makes it possible to use the procedures, techniques and rules set out in it for a wide range of engineering and technical workers, the middle and lower levels of heads of industrial enterprises. The work is written in the form of a textbook, contains a large number of examples and control exercises, and this allows you to recommend it to managers and members of quality groups to master statistical methods in order to use them in the implementation of programs to improve the quality of production.