In goal programming, deviation variables, E₁ and U₁: A)may appear in the objective function and several constraints. B)will appear in the objective function and exactly one constraint. C)must both be 0 in the optimal solution. D)can both be positive in the optimal solution.

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In goal programming, deviation variables E₁ and U₁ are used to measure underachievement and overachievement of goals, respectively. They appear in the objective function to minimize deviations from the target and are associated with exactly one constraint representing the goal.

In Goal Programming, Deviation Variables, E1 and U1

In Goal Programming, Deviation Variables, E₁ and U₁