Homework Answers
Mean and variance values are given below.
| Task | O | M | P | Te | Var^0.5 | Variance |
| J | 8 | 10 | 15 | 10.5 | 1.166667 | 1.361111 |
| K | 7 | 8 | 9 | 8 | 0.333333 | 0.111111 |
| L | 5 | 6 | 10 | 6.5 | 0.833333 | 0.694444 |
| M | 3 | 3 | 3 | 3 | 0 | 0 |
| N | 1 | 5 | 9 | 5 | 1.333333 | 1.777778 |
| O | 4 | 7 | 10 | 7 | 1 | 1 |
| P | 3 | 8 | 10 | 7.5 | 1.166667 | 1.361111 |
| Activity | ES | EF | LS | LF | Slack |
| J | 0 | 10.5 | 0 | 10.5 | 0 |
| K | 0 | 8 | 5.5 | 13.5 | 5.5 |
| L | 10.5 | 17 | 12 | 18.5 | 1.5 |
| M | 10.5 | 13.5 | 10.5 | 13.5 | 0 |
| N | 13.5 | 18.5 | 13.5 | 18.5 | 0 |
| O | 13.5 | 20.5 | 19 | 26 | 5.5 |
| P | 18.5 | 26 | 18.5 | 26 |
Critical path is JMKP with duration 26.
Variance of critical path = 2.8333
SD of critical path = (2.8333)^0.5 =1.6832
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