Hotelling’s T2 control chart with double warning lines

被引：0
|
作者：
Alireza Faraz
Ahmad Parsian
机构：
[1] Aerospace Industries Organization,Quality Management Department
[2] University of Tehran,School of Mathematics, Statistics and Computer Science
来源：
Statistical Papers | 2006年 / 47卷
关键词：
Double Warning Lines Scheme; Markov chain process; Multivariate ; control chart; Multivariate quality control; Variable sampling plan;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Recent studies have shown that the T2 control chart with variable sampling intervals (VSI) and/or variable sample sizes (VSS) detects process shifts faster than the traditional T2 chart. This article extends these studies for processes that are monitored with VSI and VSS using double warning lines (T2—DWL). It is assumed that the length of time the process remains in control has exponential distribution. The properties of T2—DWL chart are obtained using Markov chains. The results show that the T2—DWL chart is quicker than VSI and/or VSS charts in detecting almost all shifts in the process mean.
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页码：569 / 593
页数：24
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