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ON THE ESTIMATION OF σ AND THE PROCESS CAPABILITY INDICES Cp AND Cpm

Published online by Cambridge University Press:  01 April 1999

Ravindra Khattree
Ravindra Khattree
Affiliation:
Department of Mathematics and Statistics, Oakland University, Rochester, Michigan 48309-4485
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Abstract

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We consider the problem of estimation of the standard deviation σ and the process capability indices Cp and Cpm for a normally distributed process. The problem is addressed with the objective of obtaining optimal estimators under the classic criterion of minimum variance unbiased estimation, as well as under the Pitman measure of closeness.

Type
Research Article
Information
Probability in the Engineering and Informational Sciences , Volume 13 , Issue 2 , April 1999 , pp. 237 - 250
Copyright
© 1999 Cambridge University Press