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  FMEA and Control Plans
  Dimensional Notation on CP

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Author Topic:   Dimensional Notation on CP
Lurker (<10 Posts)

Posts: 4
From:Dallas, TX USA
Registered: May 2000

posted 26 May 2000 02:08 PM     Click Here to See the Profile for ChrisB   Click Here to Email ChrisB     Edit/Delete Message   Reply w/Quote
How does one handle dimensions on a control plan that are purely functional buy-offs? I have a situation in which a key dimensional characteristic is checked and bought off solely by Go/NoGo gages. The part is set up, ran, and checked with gages. At no point in the manufacuturing process is the key dimension measured, and due to the nature of the part, the dimension is almost impossible to accurately measure. Should this dimension be made "reference" and a callout added to the drawing that the part must pass a functional buy-off with the appropriate gages only? What should be done with regards to a capability study?

Any help would be appreciated. Thank you in advance.


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Jesus Sanchez
posted 26 May 2000 07:41 PM           Edit/Delete Message   Reply w/Quote
what we did were the go no go gages are functional we discuss this item with my custemer (GM Mexico) and obtain a waiver (letter from the sqa ) to check 300 parts in our ppap in front of his eyes and sign my control plan.
Personally i prefer to use a go/no go gages in my process because is more easy to my people to use. !!!

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Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA

posted 30 May 2000 12:22 PM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
In many companies changes to drawings can be like making it to hell with a cold ice tea, but notes on product acceptance methodology would be a good idea.

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