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MartinC
MartinC
Level II

Control limits on EWMA control chart JMP 16

Created: Apr 16, 2021 02:17 PM  |  Last Modified: Jun 10, 2023 1:44 PM (1404 views)

In the EWMA chart from the Legacy control charts, it is possible to specify both the weight and the K values (multiplier for control limits). Changing the K value is a typical step when parametrizing an EWMA chart.  In the new EWMA control chart in JMP16, how can I change the K value?

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5 REPLIES 5
statman
Super User statman
Super User

Re: Control limits on EWMA control chart JMP 16

Created: Apr 18, 2021 10:55 AM  |  Last Modified: Apr 18, 2021 7:59 AM (1377 views)  |  Posted in reply to message from MartinC 04-16-2021

I'm a bit confused...Here is the platform options for EWMA under Legacy Control Charts.

Screen Shot 2021-04-18 at 8.52.57 AM.jpg

 Is that the KSigma you are looking for? I see an option for changing weight and KSigma values?

"All models are wrong, some are useful" G.E.P. Box
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MartinC
MartinC
Level II

Re: Control limits on EWMA control chart JMP 16

Apr 20, 2021 07:58 AM (1336 views)  |  Posted in reply to message from statman 04-18-2021

My question is about how to change the K value in the new EWMA chart: Analyze...Quality and Process... Control Chart... EWMA Control Chart.

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tonya_mauldin
Staff tonya_mauldin
Staff

Re: Control limits on EWMA control chart JMP 16

Apr 20, 2021 09:12 AM (1327 views)  |  Posted in reply to message from MartinC 04-20-2021

There is no method to alter the value of K in the new EWMA platform.  This request has been sent to development for consideration.

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MartinC
MartinC
Level II

Re: Control limits on EWMA control chart JMP 16

Apr 22, 2021 01:38 PM (1308 views)  |  Posted in reply to message from tonya_mauldin 04-20-2021

Thank you. I hope they keep this option !

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Audrey_Shull
Staff Audrey_Shull
Staff

Re: Control limits on EWMA control chart JMP 16

Feb 28, 2022 11:23 AM (1178 views)  |  Posted in reply to message from MartinC 04-22-2021

Hi everyone - i'd like to state here that this option has in fact been implemented by the development team in the upcoming major JMP release, JMP 17. JMP 17 will be available in the fall of 2022. A K Sigma option is now available in the red triangle menu. By default, K Sigma is set to 3.