A student wants to develop a project using PERT to
modify one of products which has poor sales. She has determined the following
activities, precedence relationships and time estimates in days for the
project:
TIME estimate Exp Time Variance
Act to tm tp te Vt
a 4 6 7 5.83 0.250
b 1 2 3 2.00 0.111
c 5 5 5 5.00 0.000
d 7 9 12 9.17 0.694
e 2 4 8 4.33 1.000
f 6 9 10 8.67 0.444
1. Name all potential paths and corresponding
durations
2. Calculate ES, EF, LS, LF, and slack for all
activities.
3. How many days can activity “e” be
delayed without extending project duration?