Decision Optimization

Decision Optimization

Delivers prescriptive analytics capabilities and decision intelligence to improve decision-making.


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  • 1.  Evaluate a user-defined solution

    Posted 11/11/15 03:29 AM

    Originally posted by: Mintch Zulitch


    Hi,

    How is it possible to evaluate a user-defined solution value in a "main" block? Note that we dont want CPLEX to solve the model. Just evaluates our proposed solution values for decision variables and put them in the objective function and the constraints. Therefore, for example,I can get duals and slacks.

     

    Any help is highly regarded.


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 2.  Re: Evaluate a user-defined solution

    Posted 11/11/15 06:35 AM

    Hi,

    have you thought about using warmstart and stop at the first solution ?

    regards


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 3.  Re: Evaluate a user-defined solution

    Posted 11/11/15 08:20 AM

    Originally posted by: Mintch Zulitch


    Thanks,

    I know "warmstart" but DONT know about stopping at the first solution. I'd really glad to have an example.

    NOTE that the proposed solution values for the decision variables "can" violate the constraints and they dont necessarily have to be feasible.


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 4.  Re: Evaluate a user-defined solution

    Posted 11/11/15 09:17 AM

    Hi,

    to stop after the first solution http://www-01.ibm.com/support/docview.wss?uid=swg21400089

    By changing the bounds of constraints you may turn the model into feasible

    regards


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 5.  Re: Evaluate a user-defined solution

    Posted 11/11/15 01:05 PM

    Originally posted by: Mintch Zulitch


    So many thanks,

    But is there any better & simple idea?


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 6.  Re: Evaluate a user-defined solution

    Posted 11/11/15 01:08 PM

    Hi,

    if the objective is a formula you may compute this with any set of values.

    regards


    #DecisionOptimization
    #OPLusingCPLEXOptimizer