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what does it mean to ”define decision variables” (this is more vague, but is mostly what...

what does it mean to ”define decision variables” (this is more vague, but is mostly what went wrong)

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Defining decision variables. A decision variable is a quantity that the decision-maker controls. For example, in an optimization model for labor scheduling, the number of nurses to employ during the morning shift in an emergency room may be a decision variable.

Decision variables are added to an optimization problem by instantiating a decision variable and adding the instance to the optimization using the COptQuestOptimization::AddVariable() method.

You can optionally assign a name to a decision variable and the variable names can be used in string expressions for defining a COptQuestStringObjective or a COptQuestStringConstraint. If the variable name contains special characters such as blanks, enclose the variable name in square brackets when creating the string expression. For example, "2500*[Machine 1] + 3000 * [Machine 2] <= 100000".

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