Final Answer:
a. The network:
A B
/ \
C D
\ /
E
/ \
F G
b. The critical path is the longest path through the network.
c. The expected project completion time is the sum of the expected completion times of all of the paths through the network.
d. The probability of completing this project within 16 days is 0.25.
Step-by-step explanation:
The critical path is the longest path through the network. It is composed of the activities A, B, E, F, and G. The expected completion time of the critical path is 13.66 days.
The expected project completion time is the sum of the expected completion times of all of the paths through the network. Since the critical path is the longest path, the expected project completion time is also 13.66 days.
The probability of completing this project within 16 days is 0.25. This is because the expected completion time of the critical path is 13.66 days, and the pessimistic time for each activity on the critical path is 11 days. Therefore, the probability of completing the critical path in 16 days or less is:
= 1 - (0.1111 + 0.1111 + 1.7778 + 0.1111 + 0.6944 + 0.25)
= 0.25.
The complete question:
The following represents a project that should be scheduled using CPM:
TIMES(DAYS) = amb. Activity Immediate Predecessors amb ET (see the table on the attachment).
- a. Draw the Network
- b. What is the Critical Path?
- c. What is the expected project completion time?
- d. What is the probability of completing this project within 16 days?