Fuzzy Multivariate Process Capability Index for Measuring Process Capability

Subject Areas : Business Strategy

Saeed  Fayyaz ¹ (Iran Statistics Center (ISC), Industrial department, Tehran, Iran)
Majid  Ebrahimi ² (Department of Industrial Engineering, Mazandaran University of Science and Technology, Babul, Iran)
Ali  Gholi Nejad Devin ³ (Master student of Industrial Engineering, Sadjad Higher Education Institute, Mashhad, Iran)

Received: 2014-01-25 Accepted : 2014-06-25 Published : 2016-10-01

Keywords: fuzzy number, Keywords: Component, Process Capability Index, Multivariate Normal Distribution,

Abstract :

Abstract. In the case of process capability index several methods are identified. In this paper ,a new process capability index using fuzzy number and fuzzy probability concept, in order to remove the weakness of other famous method is suggested. After introduction of fuzzy index in univariate case, fuzzy multivariate process capability index is investigated. Finally, this new method is compared to three well-known methods in literature review, with numerical example.

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