Talk:Process capability index: Difference between revisions

Revision as of 06:59, 29 August 2007

Revision as of 16:24, 5 September 2007

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It would be ''really'' helpful, I think, if someone could add a sentence or two for each measure to say what a "good" value is ... e.g., 1.0 is good, higher is better, things like that. [[User:Sn14534|Sn14534]] 13:13, 19 July 2007 (UTC)

== CpkC<SUB>pk</SUB> ==

I have noticed that the Ckp value equation has an mistake; there shoud be T instead of µ (targed instead of estimated/calculated mean). If µ is used, the result is PPk. Could someone make the correction, please.

Antti 29th Aug 2007 <small>—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/192.130.237.254|192.130.237.254]] ([[User talk:192.130.237.254|talk]]) 06:57, August 29, 2007 (UTC)</small><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->

:*C<SUB>pk</SUB> does not take the target, T, into account according to NIST (http://www.itl.nist.gov/div898/handbook/pmc/section1/pmc16.htm) or Montgomery (http://he-cda.wiley.com/WileyCDA/HigherEdTitle/productCd-0471656313.html). Perhaps you're thinking of a variant on C<SUB>pk</SUB> that does? — [[User:DanielPenfield|DanielPenfield]] 16:24, 5 September 2007 (UTC)