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  Statistical Techniques and 6 Sigma
  Valid study for CO samples both Analyzer and Drager Tube results?

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Author Topic:   Valid study for CO samples both Analyzer and Drager Tube results?
David5657
Lurker (<10 Posts)

Posts: 2
From:Ashland
Registered: Apr 2001

posted 27 April 2001 04:24 PM     Click Here to See the Profile for David5657   Click Here to Email David5657     Edit/Delete Message   Reply w/Quote
I am trying to set up a valid study of Carbon Monoxide readings in Liquid Product. Presently, at our more modern plants, we sample the Batches continuously by analyzer and I have available a data sample for each batch (automatically logged). The Lots are sampled Prior to loading and at load finish. Sometimes by analyzer (if available) and at other facilities by Drager tube. My problem has been that when I try for a high confidence level the sample size ends up above 40,000. (far too many for us to manually log) Possibly I am attempting for too high of a level. We would like to end up reducing our sampling, after we prove that the system is under control; to once each batch and set up a random sample plan to ensure the lots remain under control. Thank-you in advance

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dWizard
Forum Contributor

Posts: 20
From:Normandy, TN 37360
Registered: Mar 2001

posted 04 May 2001 09:31 AM     Click Here to See the Profile for dWizard   Click Here to Email dWizard     Edit/Delete Message   Reply w/Quote
What confidence level are you trying to achieve?

This site http://www.variation.com/library.html has some good stuff on sampling.

This site http://www.variation.com/techlib/standard.html has some standards for download that may be of use.

Regards,
dWizard

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