topic "Mixture-Amount" DOE in JMP in Discussions

"Mixture-Amount" DOE in JMP

dp30 — Thu, 08 Jun 2023 21:06:25 GMT

Hello,

I was wondering if the "Mixture-Amount" type of DOE can be achievable in last versions of JMP (15 and 16)?

This approach is usefull when the total amount of the ingredients is a variable of interest.

https://www.researchgate.net/publication/317268230_A_Comparison_of_Mixture-Amount_and_Component-Amount_Experiments

Thanks

Damien

Re: "Mixture-Amount" DOE in JMP

Dan_Obermiller — Wed, 13 Oct 2021 16:16:41 GMT

Yes, JMP can handle the mixture amount approach. You specify your mixture components as ranging from 0 to 1. Add the mixture amount as a continuous variable with the appropriate levels. The model would then be a combined mixture-process variable type of model since you have a non-mixture factor along with the mixture components. Once the design is created you can then create the additional columns that specify what the true component ranges are for the mixture components, based on the total mixture amount.

There may be a few additions needed, such as linear constraints in order to ensure the actual component ranges match what you can achieve, but this is certainly possible.

Alternatively, you could use JMP to take the Component Amount approach that Piepel demonstrates. That approach may be a bit more straight-forward. This paper outlines how you could do either one, and JMP can help with either approach.

Re: "Mixture-Amount" DOE in JMP

dp30 — Wed, 13 Oct 2021 16:26:53 GMT

Thank you Dan. Could you please clarify at which step do you specify that the "Amount" variable is actually the sum of the mixture components?

Re: "Mixture-Amount" DOE in JMP

Dan_Obermiller — Wed, 13 Oct 2021 16:38:36 GMT

It would be when you are adding factors to your Custom Design: