How to calculate CPK with n = 1

Brad Gover

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Hi all. I was wondering how to calculate Cpk using Rbar/d2 with a subgroup size of n = 1. All of the d2 charts I have list a minimum d2 value set at n = 2. Should we use the Ppk standard deviation or some other value for d2?

Thanks,

Brad
 

Brad Gover

Involved In Discussions
Thanks Bev! It sure is great having this forum back again! I hope you have a swell Christmas too. Maybe some day our paths will cross again.
Your Friend,
Brad
 
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