The “user-defined” part of the name indicates the experimenter will choose a candidate set. The design is the entire candidate set.
At least one of the following must be set to something other than 0 to proceed.
Mixture 1 Components: The number of components in a single mixture
Mixture 2 Components: The number of components in a second, independent mixture
Numeric Factors: The number of numeric factors
Categoric Factors: The number of categoric factors
Details about the components and factors are entered on succeeding screens.