Hello research fellows!

I have to replicate an experiment which was set up with 20 runs with 8 factorial points, 6 axial points and 6 center points.

This experiment has 3 factors with 3 levels each and was performed through a factorial analysis 2³.

I already know that it is a central composite rotational design and I think I have to use DOE in Minitab, but I can't find the rooms to place the values (axial and center points) and to define the 3 levels in each factor. I see these options in separated ways and I am not achieving success to replicate the previously results.

If someone know how to perform this analysis in Minitab, please help me.

Thank you!

Guilherme.