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Control Charts for Process Dispersion Parameter under Contaminated Normal Environments

  • Amjid Ali*
  • , Tahir Mahmood
  • , Hafiz Zafar Nazir
  • , Iram Sana
  • , Noureen Akhtar
  • , Sadia Qamar
  • , Muhammad Iqbal
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Control charts are important statistical tool used to monitor fluctuations in the process location and dispersion parameters. The issues relating to the appropriate choice of control charts for the effective detection of process variability are addressed, and different control chart structures, such as Shewhart-type, exponentially weighted moving average and cumulative sum are explored under ideal assumption of normality and contaminated normal environments, and hence, those control charts structures are identified which are more capable to detect aberrant changes in the process dispersion.

Original languageEnglish
Pages (from-to)2481-2490
Number of pages10
JournalQuality and Reliability Engineering International
Volume32
Issue number7
DOIs
StatePublished - 1 Nov 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
Copyright © 2015 John Wiley & Sons, Ltd.

Keywords

  • contamination
  • dispersion
  • influence function
  • normality
  • power curves, robustness
  • standardized variance
  • statistical process control

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Management Science and Operations Research

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