Multivariate quality control

Abstract
This paper includes both the motivation for multivariate quality control, and a discussion of some ot rhe techniques currently available. The emphasis focuses primarily on control charts and includes the T2 -chart, the use of principal components anm some recent developments, multivariate analogs of CUSUM cnarts and the use of the Andrews procedure. Some of the problems associated with multivariate acceptance sampling are presented, and the paper concludes with some recommendauons for future researcn and development.

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