Evidence of production process capability is one of the basic requirements for automotive industry suppliers including metallurgical companies. From this reason these suppliers must perform process capability analysis. While in the cases of normal distribution of monitored quality characteristic the methodology of process capability analysis is practically uniform, in the cases, when data are not normally distributed, individual producers use different approaches. This fact may cause different results of process capability analysis. This paper deals with analysis of methodical approaches used by selected automotive producers for process capability analysis in the cases of non-normal distributions of monitored quality characteristic. Process capability analysis is performed using selected strategies for data with different skewness. Analysis of different process capability indices is done and achieved results are compared with other possibilities of process capability analysis in the cases of data non-normality.Keywords: Process capability, methodology, non-normality.
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