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How to identify Key Characteristics (KC) in a Design FMEA (DFMEA)

G

gdv31

#1
Hello,

At first sorry for my English?I have to indentify key characteristic (specialize geometric KC) on a product with Design FMEA in accordance with AS 9100 and AS9103.
I have a question about key characteristic. I read a lot of things about KC and Product or design FMEA but in don?t understand how identify a KC with a DFMEA. For example I don?t understand how a DFMEA can identify a hole diameter as a KC. I saw some sample with a column ?class? just after the severity column but I don?t understand how a failure of a function can produce a KC.
Dou you have some example?
Thank You for your help.
Gab
Gab
 
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Miner

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#3
The DFMEA is used to identify and mitigate risk. If a feature has a potential failure mode with an effect that has a high severity rating, or a moderately high severity rating coupled with a high occurence rating (criticality) it is a high risk feature. This may warrant identifying it as a key characteristic (or CTQ depending on your terminology).
 
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