A Design for a Three-Step Process
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: FACTEX19 */
/* TITLE: A Design for a Three-Step Process */
/* PRODUCT: QC */
/* SYSTEM: ALL */
/* KEYS: Design of Experiments, Factorial Designs, */
/* PROCS: FACTEX GLM */
/* DATA: */
/* */
/* REF: SAS/QC Software: Usage and Reference, Version 6, */
/* First Edition, Volume 1 and Volume 2 */
/* */
/* Ramirez, J. G. and Weisz, J. T. (2009), "Designing */
/* Multi-Step Fractional Factorial Split-Plots: A */
/* Combined JMP and SAS User Application," in */
/* Proceedings of the SAS Global Forum 2009 */
/* Conference, Cary, NC: SAS Institute Inc. */
/* MISC: */
/* */
/****************************************************************/
%let F1 = Z;
%let F2 = A B C D E F G;
%let F3 = P Q R S T U V W;
proc factex;
factors &F1 &F2 &F3;
model r=max;
size design=128;
blocks units=(Step1=8 Step2=8);
uniteffect Step1 / whole=(&F1) sub=(&F2 &F3);
uniteffect Step1*Step2 / whole=(&F2) sub=( &F3);
examine aliasing(units) summary;
quit;
%let F1 = Z;
%let F2 = A B C D E F G;
%let F3 = P Q R S T U V W;
proc factex order=random(restart seed=1);
factors &F1 &F2 &F3;
model r=max / maxclear;
size design=128;
blocks units=(Step1=8 Step2=8);
uniteffect Step1 / whole=(&F1) sub=(&F2 &F3);
uniteffect Step1*Step2 / whole=(&F2) sub=( &F3);
examine summary;
quit;
%let F1 = Z;
%let F2 = A B C D E F G;
%let F3 = P Q R S T U V W;
proc factex;
factors &F1 &F2 &F3;
model r=max;
size design=256;
blocks units=(Step1=8 Step2=8);
uniteffect Step1 / whole=(&F1) sub=(&F2 &F3);
uniteffect Step1*Step2 / whole=(&F2) sub=( &F3);
examine aliasing(units);
quit;