Having trouble running a Gage R&R study due to an error message

[#1]

Hi everyone,

I'm new to JMP and currently using version 17 on Windows.

I'm trying to conduct a Gage R&R study by going to Analyze > Quality and Process > Measurement Systems Analysis and selecting Gage Analysis for Measurements. However, when I right-click on the title row and choose Gage R&R, I get the following error message:

"Continuous scale group column cannot be used as a random effect."

I would appreciate any advice on how to resolve this issue.

I apologize if there are any unusual expressions in this text, as it was generated by AI.

[#2]

Hi @RandomWeasel541 ,

Generally, random effects are modelled as categorical variables, whereas continuous are fixed effects (limited to the process you are measuring). I assume that you are trying to apply a continuous variable in the 'X Grouping' section of the MSA platform? Could you provide more details?

If you have mixed effects, you may want to consider a Mixed Model approach.

By the way, if you are using AI for translation, the community page will automatically translate languages for you :)

Thanks,

Ben

[#3 · Accepted solution]

Hi @RandomWeasel541,

@Ben_BarrIngh gave you a great explanation about the error message you have received. Using a continuous variable as "X, Grouping" section of the MSA platform may not make any sense, as you could end up having a lot of different groups with no repetitions, preventing from analyzing the repeatability and/or reproducibility of your experimental process.

Instead of using directly this continuous variable as a grouping variable, you could :

• Transform it into a discrete numeric/nominal/ordinal variable if the number of levels is low enought to enable the estimation of repeatability and/or reproductibility of your process in the MSA platform,
• Create a binning formula of your continuous variable to reduce the number of possible levels to only few ordered ordinal/nominal levels.

Hope these suggestions make sense for your process,

[#4]

Hi @Victor_G, @ben_Barrlngh,

Thank you for your proposal. Your solution was very helpful in resolving GR＆R.

I appreciate your efforts on this matter.

Best regards,

Koki