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  Statistical Techniques and 6 Sigma
  layout inspection and functional testing

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Author Topic:   layout inspection and functional testing
chen
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Posts: 19
From:dongguan,guangdong,p.r.china
Registered: Nov 98

posted 08 April 1999 08:22 PM     Click Here to See the Profile for chen   Click Here to Email chen     Edit/Delete Message   Reply w/Quote
"a layout inspection and a functional verification shall be performed for all products at a frequency established by the customer." from 4.10.4.1 #40 of QS9K

Here layout inspection means we must measure all dimensions showed on design drawings
or we measure some dimensions decided by us ?

have a nice day. APR.,09/1999

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Marc Smith
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From:West Chester, OH, USA
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posted 08 April 1999 11:28 PM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
I believe it is Chrysler which mandates a yearly layout. It is now in QS9000. It is the same layout you did for PPAP, as I understand it.

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Batman
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posted 10 April 1999 11:12 AM     Click Here to See the Profile for Batman   Click Here to Email Batman     Edit/Delete Message   Reply w/Quote
Hi Chen!

Many of our first and second tier customers require an "annual PPAP." This is to fulfill the QS9000 requirement to their customers. There is another reason. You should be making product to the latest [agreed-to] customer revision. Since many of our customers transmit orders via a kanban type electronic system, from a blanket order, they are only asking for a part number and quantity. Rarely do these daily / weekly orders include versions, or revisions, to their drawings. So an annual PPAP assures at least a review of your documentation system and their files contain the latest drawing revision submission from us, and allows them to be able to submit PPAP to their customers.

We are not required to perform annual layouts for some of our customers if there has been a PPAP submitted for any reason in past 6 months. We have this in writing from them.

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Marc Smith
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posted 17 April 1999 02:02 PM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
Batman:

Thanks for helping out with some details. It's a 1 piece inspection of every dimension on the drawing (and each note as well) as I understand it. Am I correct?

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Batman
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posted 18 April 1999 12:36 PM     Click Here to See the Profile for Batman   Click Here to Email Batman     Edit/Delete Message   Reply w/Quote
Yes, each feature on the drawing - dimensions, notes, material properties, surface finish, gage, etc. Also, at least one part from each cavity, too. Some customers want 2 per cavity, fixture, etc. If you have a 16 cavity tool, 16 layout sheets are needed. We have several duplicate assembly fixtures that produce the same part - that means a layout for each.

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kavosh
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posted 13 April 2000 04:29 AM           Edit/Delete Message   Reply w/Quote
Dear colleagues,

I read the comments on Layout inspection. I've been taught that layout inspection includes tearing down the product and measuring all and every point mentioned in the drawing/specs on every part of the product. The emphasis was on all parts of the product.

Is that correct?

Thanks

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Marc Smith
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posted 13 April 2000 06:34 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by kavosh:

I've been taught that layout inspection includes tearing down the product and measuring all and every point mentioned in the drawing/specs on every part of the product. The emphasis was on all parts of the product.

Is that correct?


It can be. Typically a layout inspection is where you take the print and a part (or in your case an assembly) and you measure every feature on the print. However, some customers only ask for critical characteristics be verified. In the case of an assembly, I have not personally seen a requirement that an assembly be broken down and all sub-parts measured to print - this is typically done by the suppliers of the individual parts.

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