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Cynthia A. Lowry
Researcher at Texas Christian University
Publications - 5
Citations - 2064
Cynthia A. Lowry is an academic researcher from Texas Christian University. The author has contributed to research in topics: Control chart & Multivariate statistics. The author has an hindex of 5, co-authored 5 publications receiving 1947 citations.
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Journal ArticleDOI
A multivariate exponentially weighted moving average control chart
TL;DR: In this article, a multivariate extension of the exponentially weighted moving average (EWMA) control chart is presented, and guidelines given for designing this easy-to-implement multivariate procedure.
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A review of multivariate control charts
TL;DR: A review of the literature on control charts for multivariate quality control (MQC) is given, with a concentration on developments occurring since the mid-1980s as mentioned in this paper, where several recent articles that give methods for interpreting an out-of control signal on a multivariate control chart are analyzed and discussed.
Journal ArticleDOI
The Performance of Control Charts for Monitoring Process Variation
TL;DR: In this article, the authors evaluate the properties of the run length distributions of the Shewhart R and S-charts using a Markov chain approach and show that the rules commonly used in practice based on the Western Electric Handbook do not have the statistical performance one might expect, and provide the same in-control ARL's as the usual X-chart with runs rules.
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A comparison of quantile estimators
TL;DR: In this article, Monte Carlo simulation methods were used to compare ten nonparametric estimators of quantiles by using properties such as mean square error and mean absolute deviation, and nine distributions were used for the comparisons.