Quality characteristics analysis for the assembly of the elements from the construction of a mechanism for adjusting the seats in the automotive industry

Abstract

Statistical control of a technological process is a method that is based on a series of tools
that allow documentation, understanding, monitoring and supervising of the entire process, in order to
ensure quality finished products. When the technological process is complex, statistical methods
contribute to an early identification of systematic deviations, so that the quality characteristics are
within the allowable tolerance limits. Thus, statistical control is a preventive method of quality
management. The analysis of the capability of a production process is mainly used to determine the
capability of the process to ensure com-pliant products, by analyzing certain monitored data that are
representative of that process. The paper presents a study on the statistical control of some pieces from
the construction of electric motors used to adjust the seats of vehicles. For each piece, 8 measurements
were made, the volume of each measurement having 50 elements and the results were interpreted
through a software application developed for this purpose and made in the Java language. The software
analyzes a database consisting of the values of the dimensions of the measured pieces and identifies
whether these values have a statistically normal distribution and falls within the permissible tolerance
limits.