Double-objective economic statistical design of the VP T2 control chart: Wald's identity approach

Alireza Faraz

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Research has shown that applying the T2 control chart by using a variable parameters (VP) scheme yields rapid detection of out-of-control states. In this paper, the problem of economic statistical design of the VP T2control chart is considered as a double-objective minimization problem with the statistical objective being the adjusted average time to signal and the economic objective being expected cost per hour. We then find the Pareto-optimal designs in which the two objectives are met simultaneously by using a multi-objective genetic algorithm. Through an illustrative example, we show that relatively large benefits can be achieved by applying the VP scheme when compared with usual schemes, and in addition, the multi-objective approach provides the user with designs that are flexible and adaptive.

Original languageEnglish
Pages (from-to)2123-2137
Number of pages15
JournalJournal of Statistical Computation and Simulation
Volume84
Issue number10
DOIs
Publication statusPublished - Oct 2014

Keywords

  • Wald's identity
  • adjusted average time to signal
  • economic statistical design
  • multi-objective genetic algorithm
  • variable parameters

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