topic Re: Calculating Cpk with moving range spec limits and variable subgroup sizes in Discussions https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557513#M77122 <P>Where are your Spec Limits coming from to calculate the Cpk?</P> Tue, 18 Oct 2022 19:58:23 GMT txnelson 2022-10-18T19:58:23Z Calculating Cpk with moving range spec limits and variable subgroup sizes https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557431#M77114 <P>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?</P> Fri, 09 Jun 2023 00:55:59 GMT https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557431#M77114 Kyle_at_ii-vi 2023-06-09T00:55:59Z Re: Calculating Cpk with moving range spec limits and variable subgroup sizes https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557513#M77122 <P>Where are your Spec Limits coming from to calculate the Cpk?</P> Tue, 18 Oct 2022 19:58:23 GMT https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557513#M77122 txnelson 2022-10-18T19:58:23Z Re: Calculating Cpk with moving range spec limits and variable subgroup sizes https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557516#M77123 <P>They are specified by our client</P> Tue, 18 Oct 2022 20:00:30 GMT https://community.jmp.com/t5/Discussions/Calculating-Cpk-with-moving-range-spec-limits-and-variable/m-p/557516#M77123 Kyle_at_ii-vi 2022-10-18T20:00:30Z