Custom DOE with linear constraints

[#1]

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!

[#2 · Accepted solution]

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

I think this will work.

[#3]

Hi Dan,

yes, with this option it did work.

We should have tried it at the beginning...

Thank you very much!