[Page 793 ( continued )] - unbalanced transportation model
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a transportation model in which supply exceeds demand or demand exceeds supply -
- unbounded problem
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a linear programming problem in which there is no completely closed-in feasible solution area and therefore the objective function can increase infinitely -
- unconstrained optimization model
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a model with a single objective function and no constraints -
- undirected branch
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a branch in a network that allows flow in both directions -
- utiles
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the units in which utility is measured -
- utility
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a numeric measure of the satisfaction a person derives from money -
- utilization factor
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the probability that a server in a queuing system will be busy -
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