ILOG CPLEX 11.0 User's Manual

Reading the DataThe first part of this application reads data from a file and fills matrices:Each line in the data file corresponds to an array in the matrix and thus represents all theinformation about activities for a given job.For each job, other arrays contain further information from the data file:●●IloEnv env;IntMatrix activityOnAResource(env);NumMatrix duration(env);IloNumArray jobDueDate(env);IloNumArray jobEarlinessCost(env);IloNumArray jobTardinessCost(env);f >> activityOnAResource;f >> duration;f >> jobDueDate;f >> jobEarlinessCost;f >> jobTardinessCost;IloInt nbJob = jobDueDate.getSize();IloInt nbResource = activityOnAResource.getSize();jobDueDate contains the due date for each job;jobEarlinessCost contains the penalty for being too early for each job;● jobTardinessCost contains the penalty for being too late for each job.The matrix activityOnAResource contains the sets of activities that must be scheduledon the same resource. This information will be used to state resource constraints.Creating VariablesThe unknowns of the problem are the starting dates of the various activities. To representthese dates with Concert Technology modeling objects, the application creates a matrix ofnumeric variables (that is, instances of IloNumVar) with bounds between 0 and Horizon,where Horizon is the maximum starting date for an activity that does not excludeinteresting solutions of the problem. In this example, it is set arbitrarily at 10000. The typeNumVarMatrix is defined as typedef IloArray NumVarMatrix;NumVarMatrix s(env, nbJob);for(j = 0; j < nbJob; j++){s[j] = IloNumVarArray(env, nbResource, 0.0, Horizon);}ILOG CPLEX 11.0 — USER’ S MANUAL 369