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A lot of three identical items is to be sequenced through three machines. Each item must be processed first on machine 1, then on machine 2, and finally on machine 3. It takes 20 minutes to process one item on machine 1, 12 minutes on machine 2, and 25 minutes on machine 3. The objective is to minimize the total work span to complete all the items.
a) Write a linear program to achieve our objective. (Hint. Let xi j be the starting time of processing item i on machine j. Two items may not occupy the same machine at the same time; also, an item may be processed on machine (j + 1) only after it has been completed on machine j.)
b) Cast the model above as a network problem. Draw the associated network and give an interpretation in terms of flow in networks. (Hint. Formulate and interpret the dual problem of the linear program obtained in (a).)
c) Find an initial feasible solution; solve completely.
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After Susan Wong graduated from State University with a degree in Operations Research, she went to work for a computer systems development firm in the Washington, D.C., area.
Your company works 1 shift, 40 hours per week, 40 hours for the kiln and 40 hours for the spray paint equipment. Plot the constraints. Show the feasible region. What is the best mix of large and small globes to make the most profit?
Thus, it takes three times as long to pack a roll of pasted wallpaper, compared with a roll of standard wallpaper. The pasting plant has a capacity of 100,000 yards per week. The Marketing Department insists that the factory must produce at least ..
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Because of the popularity of the sport, the store is able to sell as many bicycles as they decide to assemble. How many bicycles of each model should they assemble in order to get the maximum profit?
Find the optimal strategy using each of the indicated pure strategies. Your values must be correct to within + or - 0.001 of the exact answers.
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