Given the following activities and precedents, draw a PERT/CPM diagram.
ACTIVITY |
IMMEDIATE PREDECESSOR |
DURATION (DAYS) |
A |
- |
10 |
B |
- |
12 |
C |
A |
4 |
D |
A, B |
8 |
E |
A, B |
9 |
F |
C |
10 |
G |
D, F |
12 |
H |
E, G |
15 |
Answer the following:
Activity | ES | EF | LS | LF | Slack |
A | 0 | 10 | 0 | 10 | 0 |
B | 0 | 12 | 4 | 16 | 4 |
C | 10 | 14 | 10 | 14 | 0 |
D | 12 | 20 | 16 | 24 | 4 |
E | 12 | 21 | 27 | 36 | 15 |
F | 14 | 24 | 14 | 24 | 0 |
G | 24 | 36 | 24 | 36 | 0 |
H | 36 | 51 | 36 | 51 | 0 |
Slack = LS-LF=EF-ES
Critical path is the longest path which is A-C-F-G-H with duration of 51 days
It will take 51 days to complete the project
Activity E has slack of 9 days so E can be delayed by maximum 9
days without delaying the completion of the project
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