Abbas, S. and Joyce, J., "Methods for Analyzing Severity Mitigation in FMEA," SAE Int. J. Engines 10(2):300-304, 2017, doi:10.4271/2017-01-0325.
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: 1a failure occurs and mitigating action is taken,2a failure occurs and mitigating action is not taken,3no 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.