"Your Guide for FMEA Information"
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Mil-Std-1629 FMEA / FMECA
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 mission degradation.
Category IV - Minor: A failure not serious enough to cause injury, property
damage or system damage, but which will result in unscheduled maintenance
or repair.
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 mission degradation.
Category IV - Minor: A failure not serious enough to cause injury, property
damage or system damage, but which will result in unscheduled maintenance
or repair.