Adding more than 2 values in DOE custom design

[#1]

Hello JMP community,

I have a problem, which is probably very simple to solve, but I have become quiet frustrated about it and need help. I want to do a DOE with continious factors, which have more than 2 values. Unfortunately in the Response Surface Design and Custom Design window I can't find any option to add more than the 2 initially defined values. First I thought, that the 2 value define the range of the factors, but my generated designs always just include those 2 values. How do I add more values or define the range of the factors in my design? Thanks in advance.

Greets Freddy

[#2 · Accepted solution]

If you specify the factors as continuous, then the high and low values are defining the range for the factors. The response surface designs (by using the Classical Designs menu) will DEFINITELY give you more than two levels. If you are using the Custom Designer, be sure that you are specifying a model that has quadratic terms (squared terms). That will force JMP to add at least a third level.

[#3]

Hello Dan,

I didn't add quadratic terms, that was the problem. Thanks for the quick help.

Greets Freddy