6. A maintenance project consists of 10 activities labeled A, B, ..., J. The durations (in...
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6. A maintenance project consists of 10 activities labeled A, B, ..., J. The durations (in days) and precedence for the activities are given below. Activity AAVAHE B D F G HI J Activity A mo Ami B (a) Develop the project network. (b) Find a critical path and critical activities. (c) What is the slack for activities D, F, and J? D Duration 7 E 3 +3598 (d) Find a second critical path. (e) Suppose B takes six days instead of three. What change in project completion occurs? The number of mechanics needed for each activity is given in the accompanying table. F G H I J 4 6 1 8 Mechanics 5 5 4 +47IWN F 6 2 3 Precedes B, C D, F E, G H I I J 1 4 (f) Draw a resource profile for the early start schedule based on the answer to part (b). (g) If there are 10 mechanics available, give a resource-feasible schedule and its profile. (h) Use the LINGO model to determine an optimal, resource-feasible schedule. In a WORD document, submit the model formulation, the output report, and your interpretation of the results. Illustrate its resource profile. (1) Compare with the solutions obtained under 8 and 12 mechanics. Be as specific as possible. Illustrate the resource profile for each scenario. 6. A maintenance project consists of 10 activities labeled A, B, ..., J. The durations (in days) and precedence for the activities are given below. Activity AAVAHE B D F G HI J Activity A mo Ami B (a) Develop the project network. (b) Find a critical path and critical activities. (c) What is the slack for activities D, F, and J? D Duration 7 E 3 +3598 (d) Find a second critical path. (e) Suppose B takes six days instead of three. What change in project completion occurs? The number of mechanics needed for each activity is given in the accompanying table. F G H I J 4 6 1 8 Mechanics 5 5 4 +47IWN F 6 2 3 Precedes B, C D, F E, G H I I J 1 4 (f) Draw a resource profile for the early start schedule based on the answer to part (b). (g) If there are 10 mechanics available, give a resource-feasible schedule and its profile. (h) Use the LINGO model to determine an optimal, resource-feasible schedule. In a WORD document, submit the model formulation, the output report, and your interpretation of the results. Illustrate its resource profile. (1) Compare with the solutions obtained under 8 and 12 mechanics. Be as specific as possible. Illustrate the resource profile for each scenario.
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a Developing the project network The project network diagram for the given activities and their precedence relationships is as follows A5 B3 C4 F6 D3 ... View the full answer
Related Book For
Introduction to Operations Research
ISBN: 978-1259162985
10th edition
Authors: Frederick S. Hillier, Gerald J. Lieberman
Posted Date:
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