Problem with adding midpoints to my design (they are not randomly distributed)Dear Community,
I have created a design with 12 factors, 11 of them are continuous and the last one is discrete numeric with three levels. I decided to add 30 midpoints (see attached screenshot of the experimental design). Why are the factors of the midpoints not randomly distributed?
I tried the model with fewer factors, and the midpoints were randomly distributed as desired.
I also tried increasing the search time and starting points of the model design, but that didn't help.
What is the problem?
If you want more details, please ask me.
Thanks a lot
Christopher Weiß
DOE
