Submitted by: Submitted by akiko
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Category: Business and Industry
Date Submitted: 04/23/2011 07:09 PM
Case study 3 - R.C Coleman
Activity | Immediate Predecessor | Optimistic (a) | Time most probable (m) | Pessimistic (b) |
ABCDEFGHIJK | ----A, BCCECD, F, GD, FHI, J | 46287444432 | 6841010666644 | 8166241382081456 |
1. Calculate expected time (activity’s mean completion) and variance
Activity | Expected time: t = (a + 4m + b)/6 | Variance = ((b-a)/6)2 |
A | 6 | 0.444 |
B | 9 | 2.778 |
C | 4 | 0.444 |
D | 12 | 7.111 |
E | 10 | 1.000 |
F | 6 | 0.444 |
G | 8 | 7.111 |
H | 6 | 0.444 |
I | 7 | 2.778 |
J | 4 | 0.111 |
K | 4 | 0.444 |
R.C Coleman’s project networFinish
I
K
J
H
G
D
F
E
C
B
A
Start
k
Activity | Earliest start | Earliest finish | Latest start | Latest finish | Slack | Critical activity |
A | 0 | 6 | 3 | 9 | 3 | |
B | 0 | 9 | 0 | 9 | 0 | Yes |
C | 9 | 13 | 9 | 13 | 0 | Yes |
D | 13 | 25 | 17 | 29 | 4 | |
E | 13 | 23 | 13 | 23 | 0 | Yes |
F | 23 | 29 | 23 | 29 | 0 | Yes |
G | 13 | 21 | 21 | 29 | 8 | |
H | 29 | 35 | 29 | 35 | 0 | Yes |...