In an assignment problem, it is necessary to add an integer constraint to the decision variables to ensure that they will take on a value of either 0 or 1.

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In an assignment problem, the decision variables inherently take on a value of either 0 or 1 due to the nature of the problem and the linear programming formulation, which typically includes constraints that naturally enforce these integer conditions without the need for explicit integer constraints.

In an Assignment Problem, It Is Necessary to Add an Integer