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  FMEA and Control Plans
  Special Characteristics

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Author Topic:   Special Characteristics
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Posts: 11
From:Monterrey, Nuevo Le—n, Mˇxico

posted 28 July 1998 11:44 PM     Click Here to See the Profile for ovidiomolina   Click Here to Email ovidiomolina     Edit/Delete Message   Reply w/Quote
Need some advice !

We are a tier-2 supplier. We supply steel in coils or sheets in many grades and dimensions.

Steel is considered as a raw material, but our customers are still asking us for ppap's.

The problem pops up with special characteristics (I recognise these as kpc, Am I wright ?). Our customers have defined none but as the norm says "the supplier has to identify key process or product atributes" we have identified the mechanical properties in our APQP formats but not in the Control Plan nor in the FMEA's formats. Of course we can trace these product characteristics into process variables which are documented in our Control Plans. If we identify them with a special symbol (own symbol) are we satisfying QS 9000 requierements ? If so, what are the compromises of doing this ?

Thans for your hints.

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Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA

posted 05 August 1998 07:59 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
As I read the spec you define what you believe is critical. If you go through your FMEA and then your control plan and you define a material characteristic as critical, you have to have some type of check identified (in the control plan). If you see something as 'important' (as opposed to critical) and it is something which can be checked 'downstream' , and you don't put it on the control plan, I think you're home free.

Bottom line is you are looking for a way to address raw material mechanical properties, right? I typically see this addressed in control plans as receiving and the verification/control in the control plan is material certifications with heat test results, etc. to accompany shipment. This is to say, the supplier does the checks (as they should - they have the equipment to do it) and provides you with proof (test results).

Have I confused the issue or does this make sense?

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