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Methods for Analyzing Severity Mitigation in FMEA

Journal Article
2017-01-0325
ISSN: 1946-3936, e-ISSN: 1946-3944
Published March 28, 2017 by SAE International in United States
Methods for Analyzing Severity Mitigation in FMEA
Sector:
Citation: Abbas, S. and Joyce, J., "Methods for Analyzing Severity Mitigation in FMEA," SAE Int. J. Engines 10(2):300-304, 2017, https://doi.org/10.4271/2017-01-0325.
Language: English

Abstract:

Severity-mitigating mechanisms (typically software-based) detect failures in a system and perform functions in order to reduce the severities of failures. Various approaches to FMEA analysis of severity-mitigating mechanisms exist within the industry. Three are compared and contrasted. Each method is compared against its ability to capture the three fundamental failures of a system that has severity-mitigating mechanisms:
  1. 1
    a failure occurs and mitigating action is taken,
  2. 2
    a failure occurs and mitigating action is not taken,
  3. 3
    no failure occurs but mitigating action is taken.
One method is advocated over the others because it: uses existing FMEA formatting; addresses all three cases; supports consistent linkage between FMEAs in a hierarchy of systems with any number of layers.