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http://dx.doi.org/10.7232/JKIIE.2013.39.2.143

An Expected Loss Model for FMEA under Periodic Monitoring of Failure Causes  

Kwon, Hyuck Moo (Department of Systems and Management Engineering, Pukyong National University)
Hong, Sung-Hoon (Department of Industrial and Information Systems Engineering, Research Center of Industrial Technology, Chonbuk National University)
Lee, Min Koo (Department of Information and Statistics, Chungnam National University)
Publication Information
Journal of Korean Institute of Industrial Engineers / v.39, no.2, 2013 , pp. 143-148 More about this Journal
Abstract
In FMEA, occurrence and detectability are not related to only failure modes itself but also their causes. It is assumed that any failure occurs after at least one cause corresponding to failure occurs in advance. Occurrence of the failure mode is described by occurrence time of its cause and elapsed time to the actual failure. Under the periodic monitoring plan, the monitoring interval is another factor to determine the detectability and occurrence of each failure mode. When a failure cause occurs, the failure does not occur if the cause is identified and remedied before it actually occurs. Under this situation, we construct an economic model for prioritizing failure modes. The loss function is based on the unfulfilled mission period. We also provide an optimal monitoring plan with an illustrative example.
Keywords
FMEA; RPN; Time Dependent Loss Model;
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