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Kyle_at_ii-vi
Kyle_at_ii-vi
Level I

Calculating Cpk with moving range spec limits and variable subgroup sizes

Created: Oct 18, 2022 01:59 PM  |  Last Modified: Jun 8, 2023 5:55 PM (2333 views)

I'm trying to automate some Cpk recording. I have a data set consisting of different product runs producing 1-8 samples each. I can obtain Cpk from the control chart platform but I'd like to automate the collection of that data. How would I calculate this with moving range as my parameter for sigma?

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2 REPLIES 2
txnelson
Super User txnelson
Super User

Re: Calculating Cpk with moving range spec limits and variable subgroup sizes

Oct 18, 2022 03:58 PM (2320 views)  |  Posted in reply to message from Kyle_at_ii-vi 10-18-2022

Where are your Spec Limits coming from to calculate the Cpk?

Jim
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Kyle_at_ii-vi
Kyle_at_ii-vi
Level I

Re: Calculating Cpk with moving range spec limits and variable subgroup sizes

Oct 18, 2022 04:00 PM (2318 views)  |  Posted in reply to message from txnelson 10-18-2022

They are specified by our client

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