Here are the optimal conditions for the model comprised of 15 Box Behnken design runs with standard least squares.
![HotellingGnu652_2-1679684614317.png HotellingGnu652_2-1679684614317.png](https://community.jmp.com/t5/image/serverpage/image-id/51466iE2D20050ECC6B51A/image-size/medium?v=v2&px=400)
The optimal conditions for the model comprised of the same 15 Box Behnken design runs + 6 new runs, yield nearly the same optimal conditions with a slightly lower defect rate to fall within the spec limits.
![HotellingGnu652_3-1679684621834.png HotellingGnu652_3-1679684621834.png](https://community.jmp.com/t5/image/serverpage/image-id/51467i2A48B1FAD1BEDD01/image-size/medium?v=v2&px=400)
Could it be statistically justifiable to compare the optimal conditions of these two models, with a T-test or any other test, as a means of model validation for the standard least squares platform? All opinions are welcome!