A directional multivariate control chart for monitoring univariate autocorrelated processes

被引:0
|
作者
Yang, Wenwan [1 ]
Zi, Xuemin [1 ]
Zou, Changliang
机构
[1] Tianjin Univ Technol & Educ, Tianjin, Peoples R China
关键词
statistical process control; autocorrelated; spatial sign test; EWMA;
D O I
10.4028/www.scientific.net/AMM.217-219.2607
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A new nonparametric multivariate control chart, based on a spatial-sign test and integrating the directional information from processes with the exponentially weighted moving average (EWMA) scheme, is developed for monitoring the mean of a univariate autocorrelated process. Simulation studies show that it has robustness in in-control (IC) performance, and it is more sensitive to the small and moderate mean shifts for non-normality underlying process than other existing multivariate chart methods.
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页码:2607 / 2613
页数:7
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