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The New Elsmar Cove Forums
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 The New Elsmar Cove Forums
 Statistical Techniques and 6 Sigma
 Unilateral tolerance capability assessments
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| Author | Topic: Unilateral tolerance capability assessments |
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KH Smith unregistered |
posted 02 May 2000 04:45 PM
 
Have you ever heard of using log normal calculations to calculate Cpm ratio. Ir gives a differnet result that using traditional methods. Why use log norma? IP: Logged |
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Marc Smith Cheech Wizard Posts: 4119 |
posted 09 May 2000 07:22 AM
 
Sorry I can't help here. Theory isn't my strong suite. IP: Logged |
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Jim Biz Forum Wizard Posts: 275 |
posted 09 May 2000 08:30 AM
Truly not my strong suit either - but from what I understand: Why use it? ..it's quick - few calculations -just "Count/Graph then compare to what can be considered a "Normal population curve"... result is a "Probable estimation of % outside or inside spec.. in the "whole" population of all similar products produced --- Call it a simple - brief- snapshot of a population/at that given time period... If you choose another set of samples the result may be quite different from day to day... or from sample set to sample set. Their use is fairly easily exlained to the end user.. Regards [This message has been edited by Jim Biz (edited 10 May 2000).] IP: Logged |
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