FMEA review, RPN reduction - Any "rule of thumb" as to what makes an RPN too high?

T

tymer5

#11
Re: FMEA review, RPN reduction - Any "rule of thumb" as to what makes an RPN too high

I like that Martin is looking at the high severity. One should always look for opportunities to reduce the severity by eliminating the FM or through the use of a compensating provision. However you can not always reduce the severity, nor is it always practical to do so. One can not understand the risk without taking into account the occurrence of the Causes. Pro-active / preventative controls that reduce the frequency of causes are often less expensive and more effective at reducing the risk. If I have a Severity of 8 and an occurrence of 1 associated with it, but I have a Severity of 7 and an occurrence of 4 associated with it. I will miss reducing the greater risk opportunity if I focus on Severity alone.
 
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B

Bill Ryan - 2007

#12
rstocum - You've gotten some pretty sage advice already and I'm not going to chime in in this particular thread. Please scroll to the bottom of the page and there are other threads listed which discuss this very question - at length. If, after reviewing those, you still have some confusion and/or questions or inputs, you could either resurrect one of those threads or come back here.

The bottom line is that you need to adopt a methodology that works for your organization. If that methodology works, you need to have the backbone to tell your customer to take a hike (sorry but I didn't want to sugarcoat it:notme: ). Common sense needs to prevail in FMEA reviews - not a customer induced "bogey".
 

rstocum

Involved In Discussions
#13
Thank you all. I was hoping to hear guidance not to go with a threshold number. Pareto charting the highest severity x occurrence number seems a good way to start. Checking the other similat threads got me onto correlating those with associated quality cost too. The QM will like that.

Thanks again!

Rich Stocum
 
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