Multivariate Charts - When and When Not To Use

Article

Constable, Gordon K.; Yen, Vincent   (1988, ASQC)   Wright State University, Dayton, OH

Annual Quality Congress, Dallas TX    Vol. 42    No. 0
QICID: 3401    May 1988    pp. 68-74
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Article Abstract

During WW II the US Government required the use of statistical quality control techniques by the producers contracting with the government. However, with the huge pent-up consumer demand at the end of WW II and the reduced reliance on government contracts, many producers promptly dropped or relegated to a minor role in their statistical quality control efforts. Since the resurgence of Statistical Process Control via the Japanese, there has been a renewed interest in advanced statistical charting techniques. This paper looks at a technique which can be used to control more than one quality characteristic fon a single chart or to control more than one measurement at different locations for a single quality characteristic. The technique is investigated for its applicability under various levels of correlation between the quality characteristics.

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