Title of article :
The Optimal Design of the VSI T2 Control Chart
Author/Authors :
Faraz, Alireza tarbiat modares university - Department of Industrial Engineering, تهران, ايران , Faraz, Alireza University of Liege - HEC Management School - Centre for Quantitative Methods and Operations Management , Kazemzadeh, R. B. tarbiat modares university - Department of Industrial Engineering, تهران, ايران , Heucherme, Cedric University of Liege - HEC Management School - Centre for Quantitative Methods and Operations Management , Saniga, Erwin University of Delaware - Department of Business Administration, USA
Abstract :
Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners detect process shifts more quickly than the classical scheme (FElS). In this paper, the econornically and statistically optimal design of the VSI T 2 control chart for monitoring the process mean vector is investigated. The cost model proposed by Lorenzen and Vance (19186) is minimized through a genetic algorithm (GA) approach. Then the effects of the costs and operating parameters on the optimal design (OD) of the chart parameters and resulting operating loss through a fractional factorial design is systematically studied and finally, based on the ANOVA results, a lVIeta model to facilitate implementation in industry is proposed to determine the OD of the VSI T 2 control chart parameters from the process and cost parameters.
Keywords :
Economic statistical design , Hotelling s T 2 control chart , Markov chain and genetic algorithm , variable sampling interval scheme
Journal title :
Journal of the Iranian Statistical Society (JIRSS)
Journal title :
Journal of the Iranian Statistical Society (JIRSS)
