/*-----------------------------------------------------------------
            S A S   S A M P L E   L I B R A R Y                   
                                                                  
      NAME: SEQDEX8                                               
     TITLE: Documentation Example 8 for PROC SEQDESIGN            
   PRODUCT: STAT                                                  
    SYSTEM: ALL                                                   
      KEYS: group sequential design                               
     PROCS: SEQDESIGN                                             
      DATA:                                                       
                                                                  
   SUPPORT: Yang Yuan             UPDATE: Aug 21, 2007            
       REF: PROC SEQDESIGN, EXAMPLE 8                             
      MISC:                                                       
-----------------------------------------------------------------*/

ods graphics on;
proc seqdesign altref=0.2  errspend
               pss(cref=0 0.5 1)
               stopprob(cref=0 0.5 1)
               plots=(asn power errspend)
               ;
   OneSidedErrorSpending: design nstages=5
                          method(alpha)=errfuncobf
                          method(beta)=errfuncpoc
                          alt=upper  stop=both
                          alpha=0.025
                          ;
run;