PROBLEM SET 5.3B
1. Consider the transportation models in Table 5.26.
(a) Use the northwest-corner method to find the starting solution.
(b) Develop the iterations that lead to the optimum solution.
(c) TORA Experiment. Use TORA's Iterations module to compare the effect of using the northwest-corner rule, least-cost method, and Vogel method on the number of iterations leading to the optimum solution.
(d) Solver Experiment. Solve the problem by modifying file solverEx5.3-l.xls.
(e) AMPL Experiment. Solve the problem by modifying file ampIEx5.3-lb.txt.
2. In the transportation problem in Table 5.27, the total demand exceeds the total supply. Suppose that the penalty costs per unit of unsatisfied demand are $5, $3, and $2 for destinations 1,2, and 3, respectively. Use the least-cost starting solution and compute the iterations leading to the optimum solution.