The FACTEX Procedure

General Recommendations

Choosing appropriate confounding rules can be difficult, especially if the set $\mc{M}$ is complicated. Even if a design is found that satisfies the model specification, it is a good idea to examine the alias structure to make sure that you understand the alias structure generated by the confounding rules. To do so, use the ALIAS option in the EXAMINE statement.

For more details about the general mathematical theory of orthogonal factorial designs, refer to Bose (1947).