Risk Priority Number (RPN)

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When performing a Process or Design FMEA, the Risk Priority Number (RPN) is a calculation to sort the risks from highest to lowest.

The RPN is calculated by multiplying the three scoring columns: Severity, Occurrence and Detection.

RPN = Severity x Occurrence x Detection

For example, if the severity score is 6, the occurrence score is 4, and detection is 4, then the RPN would be 96.

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