topic How do I apply different tests to a g-chart (rare event attribute) control chart in Discussions

How do I apply different tests to a g-chart (rare event attribute) control chart

Teena — Sat, 10 Jun 2023 20:46:41 GMT

Hello

Does anyone know how to rules other than outside limits in a g-chart (i.e a test for six (or more) points in a row continually increasing (or decreasing)).

I've tried using the preferences/platform/control charts options but not sure why it's not applying.

Any suggestions much appreciated.

(I'm using #JMPpro16 and very new to scripting so if the only way is to script I might need some really basic hints!)

Re: How do I apply different tests to a g-chart (rare event attribute) control chart

tonya_mauldin — Mon, 13 Sep 2021 14:11:36 GMT

As you have discovered, the only test JMP allows for rare event charts is test beyond limits. You would need to write a script for any additional tests. Unfortunately, I do not have any sample code to share for doing this.

Re: How do I apply different tests to a g-chart (rare event attribute) control chart

Mark_Bailey — Mon, 13 Sep 2021 15:29:48 GMT

Any additional tests depend on the nature of the response (continuous or categorical) and the distribution of the response. For example. Nelson developed a set of 8 tests for common (but not exhaustive) special causes when using the Individuals Chart (X-chart) for continuous and normally distributed data.

You might be able to use this description (see page 1192) from SAS documentation to implement appropriate tests for the G-chart in JMP.

Re: How do I apply different tests to a g-chart (rare event attribute) control chart

Teena — Fri, 17 Sep 2021 11:02:58 GMT

Thank you for confirming that I hadn't missed something obvious and indeed will work towards writing some script.

Re: How do I apply different tests to a g-chart (rare event attribute) control chart

Teena — Fri, 17 Sep 2021 11:07:22 GMT

Thank you for the link - very useful!