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Dimensional Layout

Discussion in 'APQP and PPAP' started by Aman M, Aug 17, 2020.

  1. Aman M

    Aman M New Member

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    Hi Guys, New QE here trying to learn the PPAP process. My question is can we submit a Dimensional analysis in English(inches) even though the Drawing is in Metric units(mm) when including in a PPAP submission?
     
  2. qmr1976

    qmr1976 Active Member

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    That would probably depend on the customer. I would ask them prior to submitting.
     
  3. Aman M

    Aman M New Member

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    Hi qmr1976,
    Thanks for the quick reply. Is there a hard and fast rule per AIAG 4th edition that says one way or the other?
     
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  4. qmr1976

    qmr1976 Active Member

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    You're welcome! Someone is actually borrowing my PPAP manual at the moment but I'm not aware of anything specific. I will try and look into this later today, unless someone else might be able to help. :)
     
  5. qmr1976

    qmr1976 Active Member

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    The only thing the AIAG manual states 'The organization shall provide evidence that dimensional verifications required by the design record and the control plan have been completed and results indicate compliance with specified requirements. I would recommend converting you English measurements to metric prior to submitting to the customer vs. having your customer converting the measurements.
     
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  6. John C. Abnet

    John C. Abnet Well-Known Member

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    Good day @Aman M
    Welcome to the site.

    Please allow me in turn to ask some questions to you....
    1- If you were the customer, would you want the units of measure reported back to you to be different than what is on your drawing?
    2- Instead of all the trouble to investigate and determine if you "can" submit data results inconsistent with the customer drawing, why not simply measure in metric or convert,
    ( indicating that conversion was done) ?
    3- If you sent an "inch" dimension drawing to your supplier, and your supplier returned the data as metric, what would your response be ?

    Hope this helps.


    Be well.
     
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  7. Golfman25

    Golfman25 Well-Known Member

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    Many of us old folks still think in terms of English units (old dog, new tricks problem). I automatically know what .040 looks like. I have zero clue what 1 mm looks like. :)

    To the OP, we usually put both. That way everyone is satisfied. Good luck.
     
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  8. Andy Nichols

    Andy Nichols Moderator Staff Member

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    Unlikely, however, if you are also IATF 16949 Certified, then there's a requirement to communicate in the (customers') specified "language" which might be interpreted (as @John C. Abnet is pointing out) is metric and not English units of measurement.
     
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  9. Aman M

    Aman M New Member

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    Thanks all for your help.
     
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