Thanks. This is what I was looking for.
quote:Each scale is 1-10, not 0-10.
My mistake, I meant that the rating scale is between 1-10, like you said. That's logical, because if you sum three factors with one being zero, the answer will still be zero.
quote:The RPN is an estimate of the risk posed by each failure mode AND how easy it is recognize its existence. That determines what maintenance action is required. It says nothing about the status and is not a measure of performance.
What I meant to say was that the RPN says something about what will happen if no maintenance is done on the part analysed.
RPN, like I see it, can be calculated again if one of the three factors decreases by doing maintenance on a part. This is a way to check if the maintenance proposed is effective or not.
If you said this before, a large part of this discussion should not have been necessary: FMEA + RPN = FMECA
The purpose of the FME(C)A is to set up a maintanance plan for an allready installed machine.
By the way: are you the only one with knowledge and experience with FMEA/FMECA on this forum??