Constructing a fuzzy Shewhart control chart for variables when uncertainty and randomness are combined |
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| Authors: | Alireza Faraz R Baradaran Kazemzadeh M Bameni Moghadam Aliasghar Bazdar |
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| Institution: | 1.Industrial Engineering Department, School of Engineering,Tarbiat Modares University,Tehran,Iran;2.Department of Statistics,Allameh Tabatabaee University,Tehran,Iran;3.School of Mathematical Science,Isfahan University of Technology,Isfahan,Iran |
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| Abstract: | 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. |
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