topic Re: Custom DOE with linear constraints in Discussions

Custom DOE with linear constraints

vkessler — Thu, 08 Jun 2023 21:01:44 GMT

Hi DOE cracks,

we want to optimize a process with a RSM DOE.

There are 6 continuous factors; 5 responses for optimization (mostly Match Target) and a linear constraint for two of the continuous factors (kind of mixture).

The constraint is:

10 <= FactorA / FactorB <= 20

Using the custom designer platform, we tried to add mixture factors or use a script for disallowed constraints but nothing worked so far. Using the script we got the error message:

How can we add this linear constraint anyways?

Thank you very much!

Re: Custom DOE with linear constraints

Dan_Obermiller — Wed, 09 Dec 2020 18:18:10 GMT

If I understand your situation correctly, I think you need two constraints like this:

I think this will work.

Re: Custom DOE with linear constraints

vkessler — Thu, 10 Dec 2020 14:13:03 GMT

Hi Dan,

yes, with this option it did work.

We should have tried it at the beginning...

Thank you very much!