Question

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.

a) What is the expected (estimated) time for activity C?
b) What is the variance 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?
e) What is the activity variance along the critical path?
f) What is the probability of completion of the project before
week 36? PX



Most
Activity Predecessor(s) Optimistic 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