There are seven activities in a project and the time estimates are as follows:
|
Activities
|
Time in weeks
|
|
tO
|
tL
|
tP
|
|
A
|
2
|
6
|
10
|
|
B
|
4
|
6
|
12
|
|
C
|
2
|
3
|
4
|
|
D
|
2
|
4
|
6
|
|
E
|
3
|
6
|
9
|
|
F
|
6
|
10
|
14
|
|
G
|
1
|
3
|
5
|
The logical of activities are:
1. Activities A and B start at the beginning of the project.
2. When A is completed C and D start.
3. E can start when B and D are finished.
4. F can start when B, C and D are completed and is the final activity.
5. G can scan when F is finished and is final activity the.
(a) What is the expected time of the duration of the project?
(b) What is the probability that project will be completed in 22 weeks?