Risk Evaluation of Failure Mode Using Fuzzy AHP and Variable Weight Synthesizing

Abstract:

Aiming at the most critically debated disadvantage of risk evaluation of failure mode using traditional RPN (Risk Priority Number), that the degree of failure severity isn’t accurately evaluated and the three risk factors are assumed to be equally important. The method, risk evaluation of failure mode using fuzzy Analytic Hierarchy Process (AHP) and variable weight synthesizing is put forward. The model is separated into two layers. Firstly, according to the production loss, repair costs, safety affection and environment impact, fuzzy mathematics, AHP and encouragement variable weight synthesizing are introduced into the quantitative evaluation of failure severity to improve its accuracy and objectiveness. Then, via severity, occurrence, and detection, encouragement variable weight and AHP are used for failure mode risk evaluation to make evaluation results closer to the reality. At last, an example is provided to illustrate the potential applications of the proposed model and the detailed computational process is presented. And the result shows the accuracy and objectiveness can be improved by the proposed model.

• Periodical: Advanced Materials Research (Volume 566)
• Pages: 414-419
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.566.414
• Online since: September 2012
• Authors: Shu Zhong Zhang, Qin Da Zeng
• Keywords: Analysis Hierarchy Process (AHP), Failure Mode, Fuzzy, Risk Evaluation, Variable Weight

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