Reference : On the properties of the hotelling’s T2 control chart with variable sampling intervals

	Document type :	Scientific journals : Article
	Discipline(s) :	Business & economic sciences : Quantitative methods in economics & management
	To cite this reference:	http://hdl.handle.net/2268/90012

Title :	On the properties of the hotelling’s T2 control chart with variable sampling intervals
Language :	English
Author, co-author :	Faraz, Alireza [Université de Liège - ULg > HEC-Ecole de gestion de l'ULg : UER > Statistique appliquée à la gestion et à l'économie >]
	Chalaki, Kamyar [Islamic Azad University–Urmia Branch, Urmia, Iran > School of Mathematical Science, > > >]
	Moghadam, M. B. [Allameh Tabatabaee University, Tehran, Iran > Department of Statistics, Faculty of Economic, > > >]
Publication date :	2010
Journal title :	Quality & Quantity
Publisher :	Springer Science & Business Media B.V.
Audience :	International
ISSN :	0033-5177
Keywords :	[en] Hotelling’s T 2 control chart ; Markoc chain ; Adjusted average time to signal (AATS)
Abstract :	[en] When T 2 control chart is used to monitor a process, it is usually assumed that the samples of size n0 is taken at constant intervals t0 . In this paper, we investigate the T 2 control chart for monitoring the process mean vector when the sampling intervals are variable. Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners detect process shifts more quickly than the classical scheme Fixed Ratio Sampling (FRS). In this paper, it is assumed that the length of time the process remains in control is exponentially distributed.
Permalink :	http://hdl.handle.net/2268/90012
DOI :	10.1007/s11135-010-9314-z

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