RPN and action priority

FMEA risk ranking

RPN = S × O × D

The risk priority number multiplies the severity, occurrence and detection ratings (1 to 10 each). Because very different risks can have the same RPN, the AIAG-VDA FMEA handbook (2019) replaces it with an action priority table (High / Medium / Low) that gives severity the most weight.

Calculate it

FMEA Worksheet: Severity, occurrence and detection ratings with RPN, priority ranking and CSV export.

Related terms

• AQL: acceptable quality limit