Abstract
The purpose of the study is to study the effectiveness of the introduction of statistical methods in the department of technical quality control of LLP RMTE «Kurylys-MET». A gear wheel, which is often processed at the factory, was chosen as the object of research. To calculate defects in the manufacture of a gear wheel, a Schuhart control card, a histogram and diagrams, and a Pareto diagram were used. By introducing statistical methods into the technical control department of the plant, defects in the production of the gear wheel in question are monitored, their change, and the main goal is that defective products are excluded from the corresponding technological process.