Originally posted by: chinaboy

using CP;

int nbJobs = ...;
int nbMchs = ...;

range Jobs = 0..nbJobs;
range Mchs = 0..nbMchs-1;

int arrivalTimehttp://0..nbJobs=...;
int OpDurationsj in Jobsm in Mchs = ...;

dvar int s j in Jobsm in Mchs;
dvar int cj in Jobsm in Mchs;
dexpr float gj in Jobsk in Jobsm in Mchs= sj in Jobsm in Mchs> sk in Jobsm in Mchs?1:0;

execute {
cp.param.FailLimit = 100000;
}

minimize max(j in Jobs, m in Mchs) c[j][m];
subject to {

forall (j in Jobs,m in Mchs)
s[j][m]>=arrivalTime[j];
forall (j,k in Jobs:j!=k,m in Mchs)
sj in Jobsm in Mchs>=(sk in Jobsm in Mchs+OpDurations[k][m])*gj in Jobsk in Jobsm in Mchs;
forall (j,k in Jobs:j!=k,m in Mchs)
sk in Jobsm in Mchs>=(sj in Jobsm in Mchs+OpDurations[j][m])*gj in Jobsk in Jobsm in Mchs;
forall (j in Jobs,m in Mchs)
c[j][m]==s[j][m]+OpDurations[j][m];

I think the problem comes from the underline sentence,
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: chinaboy

and what I want to do is to make "gj in Jobsk in Jobsm in Mchs=1" if"sj in Jobsm in Mchs> sk in Jobsm in Mchs"and "gj in Jobsk in Jobsm in Mchs=0"else,then using the value of "gj in Jobsk in Jobsm in Mchs"in the subject to constraint of the underline sentence.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

This is an OPL question. Please post in on the OPL Forum.
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: John Cui

Your program should be:

using CP;
 
int nbJobs = ...;
int nbMchs = ...;
 
range Jobs = 0..nbJobs;
range Mchs = 0..nbMchs-1;
 
int arrivalTime[0..nbJobs]=...; 
int OpDurations[j in Jobs][m in Mchs] = ...;
 
dvar int s [j in Jobs][m in Mchs]; 
dvar int c[j in Jobs][m in Mchs]; 
dexpr float g[j in Jobs][k in Jobs][m in Mchs]= s[j][m]> s[k][m]?1:0;
 
execute {
   cp.param.FailLimit = 100000;
}
 
minimize max(j in Jobs, m in Mchs) c[j][m];
subject to {
  
  forall (j in Jobs,m in Mchs)
    s[j][m]>=arrivalTime[j];
  forall (j,k in Jobs:j!=k,m in Mchs)
    s[j][m]>=(s[k][m]+OpDurations[k][m])*g[j][k][m];
  forall (j,k in Jobs:j!=k,m in Mchs)
    s[k][m]>=(s[j][m]+OpDurations[j][m])*g[j][k][m];   
  forall (j in Jobs,m in Mchs)
  c[j][m]==s[j][m]+OpDurations[j][m];
  
}

You can not use "j in Jobs", etc in s[j][m]>=(s[k][m]+OpDurations[k][m])*g[j][k][m];

John Cui
#CPLEXOptimizers
#DecisionOptimization