Bill Fennema, president of Fennema Construction, has developed the tasks, durations, and predecessor relationships

Problem 3.17 Bill Fennema, president of Fennema Construction, has developed the tasks, durations, and predecessor relationships in the following table for building new motels. Draw the AON network and answer the questions that follow.

Activity Immediate Predecessor Optimistic Most Likely Pessimistic
A - 4 8 10
B A 2 8 24
C A 8 12 16
D A 4 6 10
E B 1 2 3
F E,C 6 8 20
G E,C 2 3 4
H F 2 2 2
I F 6 6 6
J D,G,H 4 6 12
K I,J 2 2 3

a) What is the expected (estimated) time for activity C?
c) Based on the calculation of estimated times, what is the critical path?
d) What is the estimated time of the critical path?


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