Failure Modes & Causes in dFMEA & pFMEA

v9991

Trusted Information Resource
while performing design & process FMEA, are there any differences in approaches towards identifying 'failure modes' and 'causes'?
 
G

garibati

Hey there,
First of all note that outputs of design FMEA greatly affects process FMEA. If wrong design has been given, there is nothing to stop the product from failure. So much attention has to be paid here. Said that, design failure modes include failures due to inadequate design (such as low stress level, in adequate material, wrong tolerances, etc). The causes for each can be many. Such as wrong computation (assumptions), inadequate measuring device, etc. Process failure modes includes such as wrong tool, wrong material being used, missed operations, etc. The failure cause could be failure to maintain tools, unable to verify the material against with that given in design specification etc (think of the five M). All these depends on the intended application area of design FMEA and process FMEA. So there can be many in each to be considered.
Hope this helps,
garibati
 

Bev D

Heretical Statistician
Leader
Super Moderator
only one correction to the above: Process FMEA assuems the DESIGN is correct...just as Design FMEA assumes the thing will be manufactured (PROCESS) correctly...
 
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