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Mil-Std-1629 FMEA / FMECA
End Effect Severity Levels
Category I - Catastrophic: A failure which may cause death or weapon system
loss (i.e., aircraft, tank, missile, ship, etc...)
Category II - Critical: A failure which may cause severe injury, major property
damage, or major system damage which will result in mission loss.
Category III - Marginal: A failure which may cause minor injury, minor property
damage, or minor system damage which will result in delay or loss of availability or
Category IV - Minor: A failure not serious enough to cause injury, property
damage or system damage, but which will result in unscheduled maintenance or