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PERT/CPM with Optimistic, Most Likely, and Pessimistic times

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.
Time Estimates (in weeks)
Activity Immediate Predecessor(s) 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?

Solution Summary

The solution discussion in detail how to construct Activity On Node Network (AON), the expected time, slack time, and the critical path. The solution is a 6-page file.

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