"Your Guide for FMEA Information"
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Mil-Std-1629A uses criticality numbers to help identify which failure modes
and items are most critical in your design or process.
Failure Mode Criticality (Cm) is the portion of the criticality number for an
item, due to one of its failure modes, which results in a particular severity
classification (e.g. results in an end effect with severity I, II, etc...).
It is calculated by using the following formula:
and items are most critical in your design or process.
Failure Mode Criticality (Cm) is the portion of the criticality number for an
item, due to one of its failure modes, which results in a particular severity
classification (e.g. results in an end effect with severity I, II, etc...).
It is calculated by using the following formula:
FMECA Criticality Numbers
Item Criticality (Cr) is the criticality number associated with the item under
analysis. For a mission phase, Cr is the sum of an item’s failure mode criticality
numbers, Cm, which result in the same severity classification.
It is calculated by using the following formula within a particular severity level:
analysis. For a mission phase, Cr is the sum of an item’s failure mode criticality
numbers, Cm, which result in the same severity classification.
It is calculated by using the following formula within a particular severity level:
For more information on criticality analysis and FMECA criticality numbers,
visit our FMECA Examples page.
visit our FMECA Examples page.
