Fuzzy Assessment of FMEA for a Sewage Plant

應用模糊理論於廢水處理廠的失效模式與效應分析

10.29977/JCIIE.200711.0007

葉瑞徽(Ruey Huei Yeh)；謝妹圜(Mei-Huan Hsieh)

失效模式與效應分析FMEA ； 可靠度 ； 風險評估 ； 模糊理論 ； failure mode and effect analysis FMEA ； risk assessment ； fuzzy theory

工業工程學刊

24卷6期（2007 / 11 / 01）

505 - 512

英文

失效模式與效應分析(Failure Mode and Effect Analysis; FMEA)是一種被廣泛地運用餘各種產業的可靠度評估手法，可用來辨別產品或製程中的失效模式，並依該失效所造成的效應來排定矯正作業或預防措施施行的優先順序，藉此降低該失效發生的機會。但是，實施失效模式與效應分析時，經常會發現一些主觀評估難以判斷的缺點，爲了改善這個缺點，本篇論文提出一種以模糊理論爲基礎的重要性評估手法，並進一步以一座污水處理廠爲例，分別以傳統的失效模式與效應分析和以模糊理論爲基礎的失效模式與效應分析進行污水處理系統的可靠性分析。

Failure mode and effect analysis (FMEA) is a widely used risk assessment tool to identify the potential failure modes of a product or a process. By ranking the priorities for corrective action according to the respective effects of the failures, the chance of the failures can be reduced or eliminated. However, there could be several difficulties during conducting conventional FMEA such as the subjective and qualitative description in natural language, the relative importance among the risk ratings, the difference of risk representation among the same ratings; and the knowledge shared among FMEA team members. Thus, a new risk assessment system based on fuzzy theory is proposed in this paper to deal with these difficulties. Furthermore, an FMEA is conducted for a sewage plant to demonstrate the proposed fuzzy assessment of FMEA.

1. Bell, D.,L. Cox,S. Jackson,P. Schaefer(1992).Using causal reasoning for automated failure modes and effects analysis.Proceedings of Annual Reliability and aintainability Symposium,Las Vegas:
2. Bowles, J.B.,.E. Pelaez(1995).Fuzzy logic prioritization f failures in a system failure mode, effects, and riticality analysis.Reliability Engineering and System Safety,50,205-213.
3. Braglia, M.,M. Frosolini,R. Montanari(2003).Fuzzy criticality assessment model for failure modes and effects analysis.The International Journal of Quality and Reliability Management,20,503-525.
4. Jenab, K.,B.S. Dhillon(2005).Group-based failure effects analysis.International Journal of Reliability, Quality and Safety Engineering,12,291-307.
5. Teng, S. H.,S.Y. Ho(1996).Failure mode and effects analysis: an integrated approach for product design and process control.The International Journal of Quality and Reliability Management,13,8-26.
6. Wang, J.,T. Ruxton,C. R. Labrie(1995).Design for safety of engineering systems with multiple failure state variables.Reliability Engineering and System Safety,50,271-284.
7. Xu, K.,L.C. Tang,M. Xie,S. L. Ho,M. L. Zhu(2002).Fuzzy assessment of FMEA for engine systems.Reliability Engineering and System Safety,75,17-29.