Problem 9-24 (Algorithmic)
Office Automation, Inc., developed a proposal for introducing a
new computerized office system that will standardize the electronic
archiving of invoices for a particular company. Contained in the
proposal is a list of activities that must be accomplished to
complete the new office system project. Use the following relevant
information about the activities:
Immediate
Time (weeks)
Cost ($1000s)
Activity
Description
Predecessor(s)
Normal
Crash
Normal
Crash
A
Plan needs
—
9
8
30
50
B
Order equipment
A
8
6
120
150
C
Install equipment
B
10
7
100
160
D
Set up training lab
A
7
6
40
50
E
Conduct training course
D
10
8
50
75
F
Test system
C, E
3
3
60
—
Which project network is correct?
(i)
(ii)
(iii)
(iv)
Develop an activity schedule. If your answer is zero, enter
“0”.
Earliest
Latest
Earliest
Latest
Critical
Activity
Start
Start
Finish
Finish
Slack
Activity
A
B
C
D
E
F
What are the critical activities, and what is the expected
project completion time?
Critical Path:
Expected project completion time = weeks.
Assume that the company wants to complete the project in six
months or 26 weeks. What crashing decisions do you recommend to
meet the desired completion time at the least possible cost? Work
through the network and attempt to make the crashing decisions by
inspection.
Crash Activities
Number of Weeks
Cost ($1000s)
A
1
B
2
C
1
D
1
E
1
Develop an activity schedule for the crashed project. If your
answer is zero, enter “0”.
Earliest
Latest
Earliest
Latest
Critical
Activity
Start
Start
Finish
Finish
Slack
Activity
A
B
C
D
E
F
What added project cost is required to meet the six-month
completion time?
Total added cost due to crashing $ .