P1/P2 Values RIsk Management

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  • P1/P2 Values RIsk Management

    Posted by Joe on December 6, 2025 at 6:51 pm

    Does anyone want to talk about P1/P2 values as part of the risk management process?

    Some FMEAs include them, some do not, and Im looking to expand/broaden my knowledge on how to interpret risk management files that dont specifically call them out.

    Note (Per ISO 14971): Risk = Severity x (P1xP2)

    I think the explaination is that:

    If you can mitigate P1 (Probability of a Hazardous Situation Occuring), then by default, you eliminate P2 (Proability of a Hazardous Situation Leading to Harm) ever occuring, and therefore P1 is approx = PHarm? But I can also see where there may be instances when P1 > P2 and so the minimum of the 2 values is used as an estimate of the Probability of Harm?

    Can anyone help!?

    Thanks!

    Joe replied 22 seconds ago 1 Member · 0 Replies
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