If these assumptions are not met, the resulting statistics may be highly unreliable. The distribution of the process considered is Normal. Assumptions There are two critical assumptions to consider when performing process capability analyses with continuous data, namely: 1. Procedures when dealing with non-normal data will be considered in the following edition of EXTRAOrdinary Sense.
It is the aim of the author to address such issues by the use of discussion and case studies, and to provide some useful guidelines and insights when performing capability analysis using Minitab. It is important to emphasize that there are certain crucial assumptions, which allow the use of such values to have a meaningful interpretation, which are frequently overlooked. Abstract The use of capability indices such as C p, C pk, and Sigma values is widespread in industry. 1 Process Capability Analysis Using MINITAB (I) By Keith M.
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