Abstract
Failure mode, effects, and criticality analysis (FMECA) is a safety and reliability analysis tool that systematically identifies the consequences of component failure on systems and determines the impact of each failure mode. Thanks to its effectiveness, it becomes the most used tool in risk management. However, many researchers considered that it has some weaknesses. In FMECA analysis, risk factors are difficult to assess in a precise and complete way because of the uncertainties and inaccuracies of the expert’s judgments. They have considered also that the use of only three factors is not adapted for all activities. This article proposes the combination of fault tree analysis (FTA) and a modified factor FMECA. The modification consists on using Security and Pollution as two additional factors. The formula of risk priority number (RPN) is also adapted to the use of five factors, and the analytical hierarchy process (AHP) will be used to obtain their weights. In the end, this method is applied to a real case study to check its applicability.
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