Originally posted by: qtbgo

in 12.5 version, CP Optimizer can solve an OPL model with a multi-criteria objective.
The function staticLex defines a multi-criteria policy, ordering the different criteria and performing lexicographic optimization.

Who can refer me a literature explaining the theory of the multi-criteria optimization method used by ILOG?
thanks in advance
#DecisionOptimization
#OPLusingCPOptimizer

Originally posted by: qtbgo

My undrstand is that CP will first optimize objective 1, then objective 2,....

The question is when optimizing objective 1, what is the stop condition?
I mean when CP will switch to objective 2?
#DecisionOptimization
#OPLusingCPOptimizer

Originally posted by: SystemAdmin

CP Optimizer will improve both objectives at the same time but will improve criteria 2 only if it does not degrade criteria 1 and in turn any improvement of criteria 1 is worth any loss on criteria 2. It is not a 2-step optimization. You can see that by looking at the log of the example truckfleet.

Regards

Philippe
#DecisionOptimization
#OPLusingCPOptimizer