CH_17_10th_Edition

CH_17_10th_Edition - Project Management CHAPTER 17 PROJECT...

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Project Management CHAPTER 17 PROJECT MANAGEMENT PROBLEMS P1. A project consists of 10 activities, lettered A through J, as shown in the accompanying precedence diagram, with the activities on the arrows. For each activity, the deterministic time estimate in weeks is shown in the following table. Activity Time Activity Time A B C D E 2 4 3 5 6 F G H I J 3 4 4 3 1 a. List all of the paths through the network. b. What is the duration of each of the paths? c. What is the critical path? d. What is the second-most critical path? e. What is the slack time for each activity? f. Calculate the ES, EF, LS and LF times for each activity. P2. A project consists of 11 activities, lettered A through K, below. For each activity, the preceding activity is given, and a deterministic estimate of the length of time required to complete it in weeks. Activity Time Preceding Activity Activity Time Preceding Activity A 1 week - G 4 weeks E B 3 A H 6 F C 2 A I 2 G D 4 C J 1 H,I E 2 - K 1 B,D,J F 3 E a. Draw the precedence network for this project, with the activities on the arrows. a. List all of the paths through the network. b. What is the duration of each of the paths? 225 C A B D F I J H G
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Chapter 17 d. What is the critical path? e. What is the slack time for each activity? f. The materials required to accomplish activity F have been delayed for two weeks by a strike at the supplier's plant. What effect will this have on the length of time required to complete the project? g. An equipment breakdown has delayed activity B for one week. What effect will this have on the length of time required to complete the project? P3. A project consists of 8 activities, lettered A through H. below. For each activity, the preceding activity is given, and a probabilistic estimate of the time required to complete it. Times are in days. Preceding Optimistic Most Likely Pessimistic Activity Activity Time Time Time A -- 2 days 4 days 6 days B A 3 6 9 C A 2 5 11 D -- 2 10 12 E C,D 4 8 15 F B,E 2 4 12 G D 3 4 11 H F,G 1 1 1 a. Determine the expected time for each activity. b. Determine the variance for each activity c. Draw the PERT network for this project, with the activities on the arrows. d. List all of the paths through the network. e. What is the duration of each path? f. What is the variance of each path? g. What is the critical path? h. What is the second-most critical path? i. Activity D was delayed three days by an earthquake in the area. What effect does this have on the length of time required to complete the project? P4. Refer to Problem P3 and the original critical path before the earthquake. a. Is the assumption of independence met by the paths in this network? b. Treat the network in Problem P3 as if it meets the assumption of independence, regardless of your answer to part a of this problem. What is the probability of finishing the project within 24 days?
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This note was uploaded on 04/20/2011 for the course TOM 301 taught by Professor Williamcosgrove during the Spring '08 term at Cal Poly Pomona.

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CH_17_10th_Edition - Project Management CHAPTER 17 PROJECT...

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