An Incomplete Block Design

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 /*          S A S   S A M P L E   L I B R A R Y                 */
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 /*    NAME: OPTEX6                                              */
 /*   TITLE: An Incomplete Block Design                          */
 /* PRODUCT: QC                                                  */
 /*  SYSTEM: ALL                                                 */
 /*    KEYS: Optimal Designs,                                    */
 /*   PROCS: OPTEX  PLAN                                         */
 /*    DATA:                                                     */
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 /*     REF: SAS/QC Software:  Examples                          */
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options ps=60;

title 'Block Design For 4 Treatments In 6 Blocks of Size 2';
proc plan seed=3459;
   factors block = 6 ordered tmt = 4 ordered / noprint;
   output out=a;

proc optex seed=19471;
   class block tmt;
   model block tmt;
   generate n = 12;
   examine design;
run;

title;