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http://dx.doi.org/10.14346/JKOSOS.2018.33.3.83

Risk Evaluation of Failure Cause for FMEA under a Weibull Time Delay Model  

Kwon, Hyuck Moo (Department of Systems Management and Engineering, Pukyong National University)
Lee, Min Koo (Department of Information and Statistics, Chungnam National University)
Hong, Sung Hoon (Department of Industrial and Information Systems Engineering, Chonbuk National University)
Publication Information
Journal of the Korean Society of Safety / v.33, no.3, 2018 , pp. 83-91 More about this Journal
Abstract
This paper suggests a weibull time delay model to evaluate failure risks in FMEA(failure modes and effects analysis). Assuming three types of loss functions for delayed time in failure cause detection, the risk of each failure cause is evaluated as its occurring frequency and expected loss. Since the closed form solution of the risk metric cannot be obtained, a statistical computer software R program is used for numerical calculation. When the occurrence and detection times have a common shape parameter, though, some simple results of mathematical derivation are also available. As an enormous quantity of field data becomes available under recent progress of data acquisition system, the proposed risk metric will provide a more practical and reasonable tool for evaluating the risks of failure causes in FMEA.
Keywords
FMEA; risk evaluation metric; weibull time delay model;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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