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CONSIDERING TIME–COST TRADE-OFFS 395

6 Consider the following project network and activity times (in weeks).

C H

A

D F Finish
Start

B E G

Activity A B C D E F G H
Time 5 3 7 6 7 3 10 8

a. Identify the critical path.
b. How much time will be needed to complete this project?
c. Can activity D be delayed without delaying the entire project? If so, by how many
weeks?
d. Can activity C be delayed without delaying the entire project? If so, by how many
weeks?
e. What is the schedule for activity E?
7 A project involving the installation of a computer system comprises eight activities. The
following table lists immediate predecessors and activity times (in weeks).

Activity Immediate Predecessor Time

A — 3
B — 6
C A 2
D B, C 5
E D 4
F E 3
G B, C 9
H F, G 3

a. Draw a project network.
b. What are the critical activities?
c. What is the expected project completion time?
8 Khobar Technical College is considering building a new multipurpose athletic
complex on campus. The complex would provide a new gymnasium for intercollegiate
basketball games, expanded office space, classrooms and intramural facilities.
The following activities would have to be undertaken before construction can begin.

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