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  Statistical Techniques and 6 Sigma
  QS Cert w/o 100% Cpk

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Author Topic:   QS Cert w/o 100% Cpk
BWoods
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Posts: 44
From:Britton, SD, USA
Registered: Mar 2000

posted 30 March 2000 03:48 PM     Click Here to See the Profile for BWoods   Click Here to Email BWoods     Edit/Delete Message   Reply w/Quote
Question:
What if you are going for QS-9000 certification and don't have 100% of your processes at Cpk 1.33 or better? We have 2 processes running about 1.00 and estimate the cost to be greater than $5 million to correct. Our customer is happy. What about the QS auditors?

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Brian Dowsett
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Posts: 35
From:Waterford, Ireland
Registered: Nov 1999

posted 31 March 2000 02:32 AM     Click Here to See the Profile for Brian Dowsett   Click Here to Email Brian Dowsett     Edit/Delete Message   Reply w/Quote
3 Possibles :
1)If you are making sure the customer is happy by doing something extra (like 100% inspection) make sure this is documented in your reaction plan for processes under 1.33
2) If you aren't doing anything extra and the customer is happy, could it be that the tolerance is uneccesarily tight and you could ask for it to be changed (that'll be the day!)
3) Get your happy customer to write a waiver saying they are happy with the capability at 1.0 Cpk and would rather live with it than have you spend 5 million and either increase your price or go out of business.

Regards

Brian

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Spaceman Spiff
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Posts: 64
From:FL
Registered: Mar 99

posted 31 March 2000 08:05 AM     Click Here to See the Profile for Spaceman Spiff   Click Here to Email Spaceman Spiff     Edit/Delete Message   Reply w/Quote
Another thing to consider is when was the product approved for production. In my past experience, I was able to convince the customer that since the product was designed back in the early 80's, the design requirement was Cpk of 1. If we were required to increase our capability to the new requirement, there will be additional costs, i.e., new tooling, new equipment, etc. They happily signed the waiver.

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BWoods
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Posts: 44
From:Britton, SD, USA
Registered: Mar 2000

posted 31 March 2000 02:44 PM     Click Here to See the Profile for BWoods   Click Here to Email BWoods     Edit/Delete Message   Reply w/Quote
Thanks for your comments, guys.
What you suggested was what I was planning.
1. We currently do 100% inspection on those process points.
2. The customers are happy the the final product - these points are internal and not measurable in the finished product state. And our products meet and exceed final customer specs.
3. The when designed is also a good point. The original design is several years old and of course dates prior to QS.

Again, thanks for your input!

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