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Earliest Expected Completion Date of the Project

The following table provides the optimistic, most likely and pessimistic times for a project which has five activities. Use this information to solve the followings questions.

Activity Optimistic Most Likely Pessimistic Precedent
A 3 4 5 --
B 5 8 12 A
C 8 9 10 A
D 1 2 3 B,C
E 3 4 5 D

a. Find the earliest expected completion date of the project
b. Find variance for activity C
c. Find the variance of critical path
d. Find early finish time for activity C

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Find variance for activity C

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