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Specifying Control Line based on sigma multiplier in Control Chart Builder

IkjuShin

Hi,

We can specify control line based on sigma multiplier in legacy control chart and process screening(JMP Version)
Because most of users use CCB when they fit control chart, I think It is necessary to add this function to CCB.

I uploaded this in SE Community.

How to specify a control line with sigma's multiplier in Control chart builder - JMP User Community

Thanks

Ikju

Status: In Review

Comments

mia_stephens

Available in 16.0 via preferences.

According to Tonya Mauldin: Already available (S0825493 CRP:SUGG: Ability to change K for K-sigma (sas.com)) and mentioned in my blog post that came out last week JMP 16 new features in Control Chart Builder – part 1

IkjuShin

Hi Mia

Thank you for your feedback and I checked this again.
1. When we change K in preference, this could be good method. But I think that this method is a little inconvenient.
Customers want to change K in execution window like legacy control chart.
2. There is a strange thing when I did this function( change K in preference). I changed K to 4 and selected limits / zones.
Shouldn't the number of zones be equal to K?

Thanks

Ikju

control chart.PNG

tonya_mauldin

1) Your request for the ability to alter KSigma through the interface has been submitted as S1589007: Ability to alter KSigma through the interface (sas.com).

2) No, the number of zones should not be equal to k. This was not the case in the legacy platforms either. From the documentation "(Available only for Variables and Attribute chart types.) Shows or hides the zones on the chart. There are three equal-width zones on either side of the mean. Zones are not drawn below the LCL or above the UCL. If the limits for a Variables chart are not centered around the mean, min(Avg-LCL,UCL-Avg)/3 is used as the width of each zone. The zones for an Attributes chart use a width of (UCL-Avg)/3."

The zones are min(Avg-LCL,UCL-Avg)/3 regardless of the value given for K.

mia_stephens

IkjuShin

Thanks Mia,

mia_stephens

This has been addressed. As of JMP 17 EA3 (mid-Oct, 2021) there is a K Sigma option in the red triangle menu.

IkjuShin

Hi Mia,
Thanks for your deep consideration.
Thanks again

Ikju