Operations and Supply Chain Management 9th edition
9th Edition
ISBN: 9781119320975
Author: Roberta S. Russell, Bernard W. Taylor III
Publisher: WILEY
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Textbook Question
Chapter 9, Problem 12P
Given the following network and probabilistic activity time estimates, determine the expected time and variance for each activity and indicate the critical path:
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Duration and requirement of workforce for each activity is tabulated below for a network
Activity
Duration
Number of men
1-2
3
5
2-4
2
3
2-3
3
7
3-4
0
0
3-5
3
2
4-5
7
2
3-6
2
1
5-6
6
6
4-6
5
5
(i) Draw the network and comment on the scheduling of activities to smoothen the development of the workforce
(ii) Indicate the maximum crew size in each case
(iii) Re-schedule the activities for smooth development
(iv) Find the project schedule if only 4 men are available
Given the following network and probabilistic activity timeestimates, determine the expected time and variance foreach activity and indicate the critical path:
Construct a PERT network from the following table. Find the critical path and variance for each
event, if tō, tp, and to represent most optimistic, most pessimistic, and most likely times
respectively.
Activity 1 - 2 1 3
to
4
1
tp
tm
1
3
2-4 2
7
1
3
5
7
3 4 3- 6 4 - 5
2
9
2
5
3
4-6 5
6
3
-
1
3
6-7
7
6
2
Chapter 9 Solutions
Operations and Supply Chain Management 9th edition
Ch. 9 - Why is CPM/PERT a popular and widely applied...Ch. 9 - What is the purpose of a CPM/PERT network?Ch. 9 - Why are dummy activities used in a CPM/PERT...Ch. 9 - What is the critical path, and what is its...Ch. 9 - What is slack, and how is it computed?Ch. 9 - How are the mean activity times and activity...Ch. 9 - How is total project variance determined in...Ch. 9 - What is the purpose of project crashing analysis?Ch. 9 - Describe the process of manually crashing a...Ch. 9 - Which method for determining activity time...
Ch. 9 - Explain how a Gantt chart differs from a CPM/PERT...Ch. 9 - Discuss the relationship of direct and indirect...Ch. 9 - Describe the limitations and disadvantages of...Ch. 9 - Describe the difference between activity-on-node...Ch. 9 - Identify and briefly describe the major elements...Ch. 9 - Select an everyday project you are familiar with...Ch. 9 - Prepare a WBS for a spaghetti with meatballs...Ch. 9 - Construct a Gantt chart for the project described...Ch. 9 - Construct a Gantt chart for the project described...Ch. 9 - Use the project activities that follow to...Ch. 9 - Construct a network from the information in the...Ch. 9 - For the network in Problem 9.4, determine the...Ch. 9 - Given the following network with activity times in...Ch. 9 - Given the following network with activity times in...Ch. 9 - A marketing firm is planning to conduct a survey...Ch. 9 - In one of the little-known battles of the Civil...Ch. 9 - A group of developers is building a new shopping...Ch. 9 - The management of a factory is going to erect a...Ch. 9 - Given the following network and probabilistic...Ch. 9 - The Farmers American Bank of Leesburg is planning...
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