Calculating Cpk when sample size equals to 1

Bev D

Heretical Statistician
Staff member
Super Moderator
#11
Hi all

Can anyone recommend a book that they personally found very helpful on Cpk's? I realise its writing style may not be what I'm use to, but I'd still be willing to have a look.

Cheers
I recommend "innovative Control Charting" by Wise and Fairas well as Donald Wheeler's books "Understanding Statistical Process Control" adn "Advanced Topics in Statistical Process Control".

I am opposed to the calculation of so-called capability indexes as they are rarely accurate and never insightful. a well thought out plot of the data in time series is ALWAYS a more insightful look at variation. However, if you must I recommend teh book by Davis Bothe "Measuring Process Capability"
 
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figallo

#12
For a book, get 'Machine / Process Capability Study' by Mario Perez-Wilson on Amazon. There is also a software for called statsxpress that is for Cpk's.

Cheers
 

bobdoering

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#13
Hi all

Can anyone recommend a book that they personally found very helpful on Cpk's? I realise its writing style may not be what I'm use to, but I'd still be willing to have a look.

Cheers
I prefer the AIAG PPAP 4th edition for a good overview of not only Cpk usage, but - more importantly - when it is statistically incorrect to use it.
 
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