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  Statistical Techniques and 6 Sigma
  AQL calculation for variable sampling plan

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Author Topic:   AQL calculation for variable sampling plan
WLN
Lurker (<10 Posts)

Posts: 2
From:
Registered: Nov 2000

posted 06 July 2001 05:50 AM     Click Here to See the Profile for WLN     Edit/Delete Message   Reply w/Quote
Hi,
Does anyone know how to calculate AQL for variable sampling plan?

My problem is, I do not know how c comes about in variable sampling plan. Please help.

Thank you very much.
Regards,
Neoh

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Rick Goodson
Forum Wizard

Posts: 135
From:Wuakesha, Wisconsin, USA
Registered: Aug 2000

posted 09 July 2001 11:49 AM     Click Here to See the Profile for Rick Goodson   Click Here to Email Rick Goodson     Edit/Delete Message   Reply w/Quote
Neoh,

Your question is to complex for a simple answer in this forum. You need to look at a good text on sampling plans. Try Statistical Quality Control by Grant and Leavenworth. In Part Three look at chapter 11 on the Fundamental Concepts in Scientific Sampling and then chapter 15 Systems for Acceptance Sampling by Variables. The authors go into a fair amount of detail regarding attribute plans and the equivalent variables plan.

Rick

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Stan Hilliard
Lurker (<10 Posts)

Posts: 2
From:North St. Paul, Minnesota USA
Registered: Mar 2001

posted 19 July 2001 10:32 PM     Click Here to See the Profile for Stan Hilliard   Click Here to Email Stan Hilliard     Edit/Delete Message   Reply w/Quote
Hi Neoh,

There is a 20 page tutorial on this subject at www.samplingplans.com/modern3.htm. You can print it out.

Stan Hilliard

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AviGeva
Lurker (<10 Posts)

Posts: 4
From:Ganey Tikva 55900, Israel
Registered: Apr 2000

posted 26 July 2001 02:50 AM     Click Here to See the Profile for AviGeva   Click Here to Email AviGeva     Edit/Delete Message   Reply w/Quote
Neoh,
1. You do not really calculate AQL in variable sampling but estimate the percent deffectives.
2. You do not need "c" (acceptance number ) in variable sampling. You just compare the calculated value Ql or Qu to the tabulated one and make the decission.
I think that Rick is right, you must have a good textbook on variable sampling or take a course. It is not so easy to get an "off the sleev" answer.

Avi

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CristiánC
Lurker (<10 Posts)

Posts: 3
From:Belo Horizonte, Minas Gerais, Brazil
Registered: Jul 2001

posted 26 July 2001 09:39 AM     Click Here to See the Profile for CristiánC   Click Here to Email CristiánC     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Stan Hilliard:
Hi Neoh,

There is a 20 page tutorial on this subject at www.samplingplans.com/modern3.htm. You can print it out.

Stan Hilliard


Stan: I've tried unsuccessfully to reach that URL. Is it something wrong?

Thanks in advance!


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Rick Goodson
Forum Wizard

Posts: 135
From:Wuakesha, Wisconsin, USA
Registered: Aug 2000

posted 26 July 2001 09:44 AM     Click Here to See the Profile for Rick Goodson   Click Here to Email Rick Goodson     Edit/Delete Message   Reply w/Quote
Cristián,

I had the same problem opening the site. Use the main address, www.samplinplans.com, and you will get in. You can then click on 'tutorial on sampling' to get to the information you are looking for.

Regards,

Rick

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