Decision Optimization

Decision Optimization

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


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  • 1.  Relaxed solution

    Posted 07/25/17 03:24 AM

    Originally posted by: sandeepsinghchauhan


    I am giving inital guess to my model in constraint

    X[48]==1903;
    X[51]==50;

     

    It endup with relaxed solutions:

     dvar float+ L[j in process];

     

    How can I resolve the same? Please help


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 2.  Re: Relaxed solution

    Posted 07/25/17 06:11 AM

    Hi,

    what you could do is add a settings file (.ops) in order to change the relaxation level


    #DecisionOptimization


  • 3.  Re: Relaxed solution

    Posted 07/25/17 06:15 AM

    Originally posted by: sandeepsinghchauhan


    I am getting "No value" as solution Crying


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 4.  Re: Relaxed solution

    Posted 07/25/17 06:28 AM

    This means your model is now unfeasible.

    You should maybe watch

    https://www.youtube.com/watch?v=tUALbhJ2xWY

    and read a bit more

    Tactics for diagnosing infeasibility in mathematical programming models solved by CPLEX.

    http://www-01.ibm.com/support/docview.wss?uid=swg21400004

    regards


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 5.  Re: Relaxed solution

    Posted 07/25/17 08:07 AM

    Originally posted by: sandeepsinghchauhan


    I know where my model gets relaxed. If I do some manupulation in data would it resolve this? Please help

     


    #DecisionOptimization
    #OPLusingCPLEXOptimizer


  • 6.  Re: Relaxed solution

    Posted 07/25/17 08:09 AM

    Originally posted by: sandeepsinghchauhan


    I even know which constraint creates the problem. But I need that constraint.


    #DecisionOptimization
    #OPLusingCPLEXOptimizer