A LASSO Chart for Monitoring the Covariance Matrix

被引:26
|
作者
Maboudou-Tchao, Edgard M. [1 ]
Diawara, Norou [2 ]
机构
[1] Univ Cent Florida, Dept Stat, Orlando, FL 32816 USA
[2] Old Dominion Univ, Dept Math & Stat, Norfolk, VA 23529 USA
来源
关键词
Average run length (ARL); covariance matrix; multi standardization; penalized likelihood function; MULTIVARIATE PROCESS VARIABILITY; PENALIZED LIKELIHOOD; MODEL; SELECTION;
D O I
10.1080/16843703.2013.11673310
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Multivariate control charts are essential tools in multivariate statistical process control. In real applications, when a multivariate process shifts, it occurs in either location or scale. Several methods have been proposed recently to monitor the covariance matrix. Most of these methods use rational subgroups and are used to detect large shifts. In this paper, we propose a new accumulative method, based on penalized likelihood estimators, that uses individual observations and is useful to detect small and persistent shifts in a process when sparsity is present.
引用
收藏
页码:95 / 114
页数:20
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