LOGICAL PROCEDURE FOR DETERMING THE APPROPRIATE METHOD OF CALCULATING THE PROCESS CAPABILITY

Various types of influences that operate within a relatively simple production systems lead to the fact that, in these processes, a complex system of governing actions on the output parameters exists. Predicting output parameters in the future is a challenge and requires the use of many statistical tools as an important part of quality assurance in production systems. Various mathematical probability distributions that can describe the output parameters often make it difficult to assess process capability. Selection of process capability calculating formula requires data pre-processing with which it is possible to reach concise and accurate conclusions about the state of the process. This paper proposes the procedure for data pre-processing based on which it is possible to choose the appropriate formula for the calculation of process capability. Mathematical methods that are an integral part of the process are presented as well as their application in the example from the automotive industry.