Mathematical Sciences: Faculty Publications

A Comparison of Two Phase One Control Charts

Document Type

Conference Proceeding

Publication Date

8-12-1995

Publication Title

Proceedings of the Quality and Productivity Section of the American Statistical Association

Abstract

The Shewhart X- and R- (or S-) charts are commonly used to monitor the mean and standard deviation of a continuous quality measure. Another use of the control chart is to analyze a set of preliminary data taken on the output of a production process to determine if the process is behaving in a stable manner. A chart used in this manner is referred to as a Phase I or retrospective control chart. We give a comparison of two Phase I control charts recommended in the literature.

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