Develop a project network for this problem. b) Determine the expected duration and variance for each activity. c) Determine the EST, EFT, LST, LFT, and slack for each activity. d) What is the critical path and project completion time? e) What is the probability that the job will finish in 33 days or less?
An electronic contractor is examining the amount of time his crews take to complete wiring jobs. Some crews take longer than others. For an upcoming job, a list of activities and their optimistic, most likely, and pessimistic completion times are given in the following table.
|
Days |
|
||
Activity |
a |
m |
b |
Immediate Predecessors |
A |
2 |
5 |
8 |
- |
B |
1 |
3 |
5 |
- |
C |
1 |
2 |
3 |
- |
D |
5 |
6 |
7 |
C |
E |
1 |
3 |
5 |
B, D |
F |
5 |
9 |
13 |
A, E |
G |
1 |
2 |
3 |
A, E |
H |
2 |
5 |
8 |
F |
I |
9 |
10 |
11 |
G |
J |
13 |
15 |
20 |
G |
K |
4 |
7 |
10 |
H, I |
a) Develop a project network for this problem.
b) Determine the expected duration and variance for each activity.
c) Determine the EST, EFT, LST, LFT, and slack for each activity.
d) What is the critical path and project completion time?
e) What is the probability that the job will finish in 33 days or less?
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