Question: Activity Immediate Predecessors Optimistic Most Likely Pessimistic (a) (m) (b) A - 3 8 19 B - 12 15 18 C A 2 6 16

Activity

Immediate

Predecessors

Optimistic

Most Likely

Pessimistic

(a)

(m)

(b)

A

-

3

8

19

B

-

12

15

18

C

A

2

6

16

D

A

4

9

20

E

B,D

1

4

7

a) Calculate the expected duration and variance of each activity

b) Draw the network diagram.

c) What is the estimated time to finish the project and what is the critical path?

d) Calculate the project variance and standard deviation of this project.

e) Assuming the normal distribution applies, what is the probability that the project will be completed

in less than 21 weeks.

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