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11 Cards in this Set
- Front
- Back
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Transportation, transshipment and assignment problems are all part of what larger class of linear programming problems?
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network flow problems
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What are the defining characteristics of transportation problems?
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(1) a product is transported from a number of sources to a number of destinations at the minimum possible cost; and (2) each source is able to supply a fixed number of units of the product, and each destination has a fixed demand for the product.
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What is a balanced transportation problem?
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model in which supply equals demand, all constraints are equalities
(supply exactly equals demand) |
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What is a unbalanced transportation problem?
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supply is greater than demand or demand is greater than supply.
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How do you deal with a balanced transportation problem in the model formulation?
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supply equals demand so the supply and demand constraints will be =
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How do you deal with an unbalanced transportation problem in the model formulation?
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either supply is greater then demand, or demand is greater then supply. Ex if supply exceeds demand, then supply constraint will be <=
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What differs in the model formulation if the supply exceed demand?
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If supply exceeds demand, then the supply constraints would be ≤
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What differs in the model formulation if demand exceeds supply?
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if demand exceeds supply, then demand constraints would be ≤
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What is Frank L. Hitchcock credited with doing?
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He formulated the transportation problem as a method for supplying a product from several factories to a number of cities, giving varying freight rates.
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What is the difference between a transportation problem and a transshipment problem?
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its an extension of the transshipment problem in which intermediate transshipment points are added between the sources and destinations.
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What is unique about the assignment model?
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the supply at each source and the demand at each destination are each limited to one unit.
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