Question: A small software development project has four major activities. The times are estimated and provided in the table below: Activity Immediate Predecessor a m b

A small software development project has four major activities. The times are estimated and provided in the table below:

Activity Immediate Predecessor a m b
A -- 2 5 8
B A 3 6 9
C A 4 7 10
D B 2 5 14
E D 3 3 3
F C 6 8 10
G E, F 1 1 1
H C 6 10 14
I G, H 3 4 5

What variance would be used in finding probabilities of finishing by a certain time?

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