MONITORING THE COVARIANCE MATRIX WITH THE VMAX CHART

被引：0
|
作者：
Machado, Marcela A. G. [1 ]
Costa, Antonio F. B. [1 ]
机构：
[1] UNESP Sao Paulo State Univ, BR-12516410 Guaratingueta, SP, Brazil
来源：
14TH ISSAT INTERNATIONAL CONFERENCE ON RELIABILITY AND QUALITY IN DESIGN, PROCEEDINGS | 2008年
关键词：
Control charts; Covariance matrix; Generalized variance;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this article, we propose a new statistic to control the covariance matrix of bivariate processes. This new statistic is based on the sample vat-lances of the two quality characteristics, shortly VMAX statistic. The points plotted on the chart correspond to the maximum of the values of these two variances. The reasons to consider the VMAX statistic instead of the generalized variance vertical bar S vertical bar are faster detection of process changes and better diagnostic feature, that is, with the VMAX statistic It is easier to identify the out-of-control variable.
引用
收藏
页码：100 / 104
页数：5
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