In eXpress, the Criticality Report (invoked within a FMECA study) shows how many failures fall into each section of this matrix. This report also lists the “Relative Criticality” for each failure—a calculation that quantifies this qualitative criticality from MIL-STD-1629A.

 

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Through all Failures

 

The relative criticality is calculated by multiplying the failure rate of each failure by a percentage derived from that failure’s severity class. This gives a numeric Test limit to each failure that corresponds to its place on the diagonal of the Criticality Matrix, so to speak.