Showing papers by "William H. Woodall published in 1996"
TL;DR: For multivariate statistical process control with individual observations, the usually recommended procedure in the retrospective phase is the Hotelling's T2 control chart as discussed by the authors, where all the observations are pooled to estimate the mean vector and covariance matrix.
Abstract: For multivariate statistical process control with individual observations the usually recommended procedure in the retrospective phase is the Hotelling's T2 control chart. All the observations are pooled to estimate the mean vector and covariance matrix..
256 citations
TL;DR: In this article, a control chart based on individual observations for detecting a shift in either the mean or variance, or both, is developed from a likelihood ratio test (LRT).
Abstract: A preliminary control chart based on individual observations for detecting a shift in either the mean or variance, or both, is developed from a likelihood ratio test (LRT). The proposed LRT control chart offers the advantage of improved detection ..
113 citations
TL;DR: The purpose of this paper is to examine the strengths and weaknesses of this formulation, suggest possible improvements, and discuss fundamental questions about fuzzy linear regression.
67 citations