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ANOM JMP v's Wheeler

Gadsdon

Hi I am trying to replicate an ANOM that Wheeler did in Understanding Industrial Experimentation p60 (details attached)

I have attached the data set, I get different control limits for some reason, I set the alpha level at 0.10

Can you advise

ANOM.pdf

ANOM_Wheeler.jmp

Accepted answers

KarenC

The JMP help notes that JMP implements the methods from Nelson, et. al (2003). link to JMP ANOM help

The methodology in the Nelson book differs slightly from Wheeler's, for instance the measure of error differs. Therefore, the ANOM decision limits calculated in JMP will differ from those in the Wheeler book. You can find the Nelson ANOM book here (ANOM Book ).

For the equal case for means the decision limits are:

KarenC

Wheeler uses ranges, JMP/Nelson uses standard deviations. Generally they are going to give you "similar" results. The key is plot your data, understand your measurement systems, use ANOM decision lines to guide your decision making. Since you are using JMP use the ANOM charts in JMP.

All comments

KarenC

The JMP help notes that JMP implements the methods from Nelson, et. al (2003). link to JMP ANOM help

For the equal case for means the decision limits are:

Gadsdon

Thanks Karen, I asppreciate your response here

Gadsdon

Hi Karen, I just looked at the book, your one of the the authors. So which is the best method and why ;0)

KarenC