Risk Priority Number (RPN)
Risk Priority Number (RPN) is a numeric assessment of a risk to help identify critical failure modes in a process or a design. It ranges from 1 to 1000. It is calculated while doing Failure Modes and Effect Analysis using the below formula
RPN = Severity (S) x Occurrence (O) x Detection (D).
An application oriented question on the topic along with responses can be seen below. The best answer was provided by Vishwadeepak Choudhary on 24th August 2017.