Evaluating the Risk of Failure on Injection Pump Using Fuzzy FMEA Method

Abstract:

This research is aimed at utilizing failure mode and effect analysis (FMEA) which is a reliability analysis method applicable to rotary injection pump design. In traditional FMEA, Risk Priority Number (RPN) ranking system is used to evaluate, the risk level of failures to rank failures and to prioritize actions. RPN is obtained by multiplying the scores of three risk factors like the Severity (S), Occurrence (O) and Detection (D) of each failure mode. RPN method can not emphasise the nature of the problem, which is multi-attributable and has a group of experts' opinions. Furthermore, attributes are subjective and have different importance levels. In this paper, a framework is proposed to overcome the shortcomings of the traditional method through the fuzzy set theory. Two case studies have been shown to demonstrate the methodology thus developed. It is illustrated a parallel between the results obtained by the traditional method and fuzzy logic for determining the RPNs. We expect that fuzzy FMEA model will assist FMEA team in assess and rank risks more precisely compared with risk assessment model of method.

• Periodical: Applied Mechanics and Materials (Volume 657)
• Pages: 976-980
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.657.976
• Online since: October 2014
• Authors: Nicoleta Rachieru, Nadia Belu*, Daniel Constantin Anghel
• Keywords: Failure Effects, Failure Mode, Fuzzy Set, Injection Pump, Risk Evaluation

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