Question: The table below shows the activities in a project and their pessimistic, most likely and optimistic durations and the expected time for each activity. Activity

The table below shows the activities in a project and their pessimistic, most likely and optimistic durations and the expected time for each activity.

Activity

a

m

b

Et

A

2

3

4

X

B

5

6

7

6

C

5

6

7

6

D

3

4

5

4

E

2

3

4

3

F

3

4

5

4

G

9

11

16

Y

  1. Work out the values of X and Y.
  2. The project has the following critical paths. DO NOT DRAW THE NETWORK DIAGRAMS.

A-C-D-F

C-D-E-F

A-B-D-F

Determine the completion time that the project manager should quote with a 90% certainty.

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