Reference : Hotelling’s T2 control chart with two adaptive sample sizes
Scientific journals : Article
Business & economic sciences : Quantitative methods in economics & management
Hotelling’s T2 control chart with two adaptive sample sizes
[en] VSS T2
Faraz, Alireza mailto [Université de Liège - ULiège > HEC-Ecole de gestion : UER > Statistique appliquée à la gestion et à l'économie >]
Moghadam, M. B. mailto [Allameh Tabatabaee University, Tehran, Iran > Department of Statistics, Faculty of Economic, > > >]
Quality and Quantity
Springer Science & Business Media B.V.
Yes (verified by ORBi)
[en] Hotelling’s T 2 control chart ; Adjusted average time to signal (AATS) ; Adaptive sample size
[en] Some quality control schemes have been developed when several related quality
characteristics are to be monitored. The familiar multivariate process monitoring and control
procedure is the Hotelling’s T 2 control chart for monitoring the mean vector of the process.
It is a direct analog of the univariate shewhart ¯ x chart. As in the case of univariate, the ARL
improvements are very important particularly for small process shifts. In this paper, we study
the T 2 control chart with two-state adaptive sample size, when the shift in the process mean
does not occur at the beginning but at some random time in the future. Further, the occurrence
time of the shift is assumed to be exponentially distributed random variable.

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