Recent developments in statistical quality control include the study of the process capability. Much attention has been given to the estimation and the tests Of hypotheses in this regard. This paper brings together the recent work that has been done iu this Of particular interest is the distribution theory of the statistics used for this purpose. Various violations of the assumptions are examined. Extensions to the bivariate normal situation are alw reviewed.
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2-SIDED AND ONE-SIDED PROCESS CAPABILITY INDEXES,TESTS OF HYPOTHESES,CONFIDENCE LIMITS,NONCENTRAL CHI-2 AND T-DISTRIBUTIONS,CONTAMINATION MODEL,EDGEWORTH SERIES DISTRIBUTION