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