Comments on: Process Capability Calculations with Non-Normal Data
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/
Six Sigma Quality Resources for Achieving Six Sigma ResultsWed, 13 Jan 2016 10:27:44 +0000
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By: Simone
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/#comment-560
Wed, 13 Jan 2016 10:27:44 +0000https://www.isixsigma.com/?p=1098#comment-560Ops, I’m sorry, I said wrong! P-value is less than 0.05 therefore it’s reasonable rejecting the null Hypothesys, so data are NOT normal
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By: Simone
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/#comment-559
Tue, 12 Jan 2016 12:57:11 +0000https://www.isixsigma.com/?p=1098#comment-559Dear Sir,
I’ve a concern: as P-Value of the Summary (Fig.3) is less than 0.005, data are already normal, therefore I shouldn’t make any transformation, isn’t it?
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By: Erick
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/#comment-558
Wed, 04 Apr 2012 14:39:32 +0000https://www.isixsigma.com/?p=1098#comment-558The fact of transforming data doesn’t mean that you are losing information or that you are going to transform data without understanding what is happening, by the contrary if one is smart can understand the nature of the data and the implications that bring the tranformation. And, of course, to find the sources of variation.
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By: psnandakumar
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/#comment-557
Tue, 07 Jun 2011 10:24:21 +0000https://www.isixsigma.com/?p=1098#comment-557This is a very useful article. I was working on a similar project and had to combine two subsets of data for calculating process capability. This article gives a good insight on how to do this.
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By: Rene De La Torre
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/#comment-556
Fri, 11 Feb 2011 23:38:55 +0000https://www.isixsigma.com/?p=1098#comment-556Believe is using the same normal capability analysis but have to click the box cox button and enable box cox power transformation, but not a 100% sure.
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By: Roger LaVine
https://www.isixsigma.com/tools-templates/capability-indices-process-capability/process-capability-calculations-non-normal-data/#comment-555
Tue, 20 Apr 2010 21:17:22 +0000https://www.isixsigma.com/?p=1098#comment-555The only correct comment made is to understand the source of the variation. The normal distribution is a theoretical convention. All real world data has many sources of variation. The smart person learns the proper way to be true to the data and uses techniques to discover sources of variation and does not bury useful information by transforming it or splitting into non useful little chunks
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