Numeric Factors: How many continuous numeric factors are involved in the experiment?
Categoric Factors: How may discrete or categoric factors are involved in the experiment?
For these designs the number of runs required for the numeric factors will be multiplied by the number of categoric combinations. If two categoric factors having three levels each are added to these designs the number of runs will be multiplied by nine. Consider optimal designs when you have both numeric and categoric factors.
Model: The options are linear, quadratic, and cubic models. The number and location of points is determined by the model selected.
Center points: The number of additional points to be placed at the average of the low and high setting of the factor.