October 6, 2003 at 5:47 am #33500
The formula for RPN is S*O*D(s:SEVERITY;o:OCCURENT;d:DETECTION), and the question is how should we get the s/o/d, from historical data or evaluations from process team? Thanks very much!0October 6, 2003 at 12:14 pm #90671
DaveGParticipant@DaveG Include @DaveG in your post and this person will
be notified via email.
Get SOD with 1 or more methods:
1) Use instructions in your FMEA document – the AIAG booklet gives clear descriptions ranked 1 – 10 for S, O and D;
2) Make your own standard and apply it – make it as objective as possible so all teams produce consistent RPNs – by all means, use data! RPNs and FMEAs are meant to be dynamic, so on a periodic basis they should be reviewed, updated with the most current process state, and RPNs recalculated based on actual performance data
3) Other posters will have other ideas0October 6, 2003 at 12:35 pm #90673
FMEA is a defined process. The key to making the process work is the level of knowledge contained by the subject matter experts participating.
Severity is a judegement: you should have defined factor prior to beginning the FMEA agreed to by the participants. When in doubt utilize the standard format.
Probability of occurrence: It would be great if you have historical data, if not once again you are subject to the consensus view
Detectability: This should be hard factual evidence, do you have a system in place and will it catch all possible occurrences?
The forum ‘General’ is closed to new topics and replies.