[en] Faraz and Parsian (Statistical Paper, 47: 569–593, 2006) have shown that the
double warning lines (DWL) scheme detects process shifts more quickly than the other
variable ratio sampling schemes such as variable sample sizes (VSS), variable sampling
intervals (VSI) and variable sample sizes and sampling intervals (VSSVSI). In this paper, the
DWLT2control chart for monitoring the process mean vector is economically designed. The
cost model proposed by Costa and Rahim (Journal of Applied Statistics, 28: 875–885, 2001)
is used here and is minimized through a genetic algorithm (GA) approach. Then the effects
of the model parameters on the chart parameters and resulting operating loss is studied and
finally a comparison between all possible variable ratio sampling (VRS) schemes are made
to choose the best option economically.
Disciplines :
Quantitative methods in economics & management
Author, co-author :
Faraz, Alireza ; Université de Liège - ULiège > HEC-Ecole de gestion : UER > Statistique appliquée à la gestion et à l'économie
kazemzadeh, R. B.; Tarbiat Modares University, Tehran, 14115-179, Iran > Industrial Engineering Department
Parsian, Ahmad; University of Tehran, Tehran, Iran > Statistics and Computer Science
Moghadam, M. B.; Allameh Tabataba’i University, Tehran, Iran > Department of Statistics
Language :
English
Title :
On the advantages of economically designed the Hotelling’s T2 control chart with variable sample sizes and sampling intervals
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