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  Statistical Techniques and 6 Sigma
  Sampling Techniique

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Author Topic:   Sampling Techniique
Uteesh Dhar
Lurker (<10 Posts)

Posts: 5
From:Muscat, Oman
Registered: Sep 2000

posted 10 November 2000 04:32 PM     Click Here to See the Profile for Uteesh Dhar   Click Here to Email Uteesh Dhar     Edit/Delete Message   Reply w/Quote
We are in business of fabric dyeing. This process is done lotwise depending on the capacity of the dyeing machine. What should be the sample size to check evenness of dyeing shade. The lot size usually is 1000 meters of fabric. This is with reference to ISO 9001:2000. Our certification audit is scheduled for 13th November 2000

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Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA

posted 16 November 2000 07:43 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
Damn... I HATE these CQE questions. Because I also HATE unanswered questions, I'm 'bumping' this to see if anyone has an answer, my not being a statistical guru. And I do apologise for not doing this prior to your registration audit. I hope it went well.

I do remember from my CQE days, more than 10 years ago now, where they had a question similar to this. If I remember anything more I'll post it.

In the mean time - how about it --- any statistical gurus out there reading this with ideas?

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Rick Goodson
Forum Wizard

Posts: 102
From:Wuakesha, Wisconsin, USA
Registered: Aug 2000

posted 16 November 2000 05:33 PM     Click Here to See the Profile for Rick Goodson   Click Here to Email Rick Goodson     Edit/Delete Message   Reply w/Quote
This is a difficult one. Not an area I feel comfortable making recommendations about. Never the less, there is a very comprehensive (and expensive) book that may be of help. The book is Acceptance Sampling in Quality Control by Ed Schilling, ISBN 08247-13478 ($99 at Barnes and Noble). IMHO Ed Schilling probably knows more about sampling than anyone else. If you really need to have a statistically based sampling plan on this I would get hold of a copy of his book or try and contact him. Years ago he use to be assocuated with the University of Rochester in New York.

Hope this helps.

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Laura M
Forum Contributor

Posts: 299
From:Rochester, NY US
Registered: Aug 1999

posted 16 November 2000 08:44 PM     Click Here to See the Profile for Laura M   Click Here to Email Laura M     Edit/Delete Message   Reply w/Quote
Ed Schilling is on staff at the Rochester Institute of Technology. When I started at RIT in 1984 he was the Director of the Center for Quality and Applied Statistics (Possibly at U of R prior to that) He has since retired from the directors job, and on staff as a professor. Last I knew, he was still there, and dittos to Rick's comment about him being an expert in sampling.
This particular post sounds like a test question!
You may be able to reach Ed at 716-475-6990, or do a web search and hit the email.

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