Question # 2

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Question #
2



[20 marks]
The following is a project is to be carried out by the ZenJet
paper company. The activities to carry out the project, their
predecessors and times are given, where the times for the
activities are in weeks.
Table 1: Activity Times and Predecessors
Activity
Immediate Predecessors
Optimistic Time (a)
Most Likely Time (m)
Pessimistic Time (b)
Variance
A
–
6
8
9
0.25
B
–
9
12
15
?
C
A, B
4
6
11
1.36
D
B
3
4.5
6
?
E
A
1
2
3
?
F
C
1
3
5
?
G
E, F
5
6
10
?
H
D, F
2
3
4
?
I
G, H
1
1
1
?
J
I
2
3
7
?
Required