Quality & Quantity

, Volume 44, Issue 5, pp 905–914 | Cite as

Constructing a fuzzy Shewhart control chart for variables when uncertainty and randomness are combined

  • Alireza Faraz
  • R. Baradaran Kazemzadeh
  • M. Bameni Moghadam
  • Aliasghar Bazdar


In this paper we introduce a fuzzy chart for variables which is used in situations when uncertainty and randomness are combined. It is showed that the Shewhart chart’s control limits must be adjusted in these situations. However, this chart is based on a fuzzy acceptance region and this method arises when a decision should be made by referring to the grade of a sample statistic belonging to the fuzzy acceptance region.


Membership Function Fuzzy Number Control Chart Control Limit Fuzzy Logic Controller 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Alireza Faraz
    • 1
  • R. Baradaran Kazemzadeh
    • 1
  • M. Bameni Moghadam
    • 2
  • Aliasghar Bazdar
    • 3
  1. 1.Industrial Engineering Department, School of EngineeringTarbiat Modares UniversityTehranIran
  2. 2.Department of StatisticsAllameh Tabatabaee UniversityTehranIran
  3. 3.School of Mathematical ScienceIsfahan University of TechnologyIsfahanIran

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