ABSTRACT
In the first phase of the process, i.e. the process capability study a “reference or base” sample is typically selected and based on its values, targets are set as reference for future testing of observations. Moreover, the data from the “reference” sample are used to assess the covariance pattern of the analyzed characteristics as well. In a second phase of the process the newly tested samples are routinely compared against the target values determined from the “reference” samples.
