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Sep 13, 2016 1:34 PM
(9837 views)

Presently trying to manually set the control limits in Levey Jennings control chart since my data has a natural limit of LCL = 0. Can you please suggest how can I do it in JMP Pro 12?

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right mouse click on the column of interest and select

Column Properties==>Control Limits

Then select Levey Jennings

and then set your LCL

Jim

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right mouse click on the column of interest and select

Column Properties==>Control Limits

Then select Levey Jennings

and then set your LCL

Jim

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Re: Setting Control limits manually for Level Jennings chart

Hi Jim,

Thank you for the solution

I have selected the CL, LCL and UCL columns and put in the following information as you have mentioned above

CL = 28907525.70

LCL = 0

UCL = 3648261306.71

But when I am clicking on Analyze<Quality and Process<Control Chart<Levey Jennings Control chart it is not taking my set limits. Can you please tell me where I am going wrong?

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Re: Setting Control limits manually for Level Jennings chart

Is it possible that you set the UCL and LCL for XBar, or C Chart, etc. rather than for the Levey Jennings? I used the Semiconductor Capability data table from the Sample data tables, and set the Levey Jennings LCL to 0 and the UCL to 120 and then ran the Control Chart platform for Levey Jennings, and got the following results:

Jim

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What if your limits keep changing and climbing with each point? An example could be rheometer data; hydration vs. time. I need to set my limits using a column of data for both upper and lower. thanks!

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Re: Setting Control limits manually for Level Jennings chart

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You can use a phase variable and a limits data table. Details can be found in the following blog post.

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Re: Setting Control limits manually for Level Jennings chart

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Thank you Tonya, that is exactly what I was looking for. I am excited to circle back soon and try it!

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Re: Setting Control limits manually for Level Jennings chart