The network below represents a project being analyzed by the critical path method

Activity durations are A = 5, B = 2, C = 12, D = 3, E = 5, F = 1, G = 7, H = 2, I = 10, and J = 6.

a. What task must be on the critical path, regardless of activity durations?
b. What is the duration of path A-B-E-H-J?
c. What is the critical path of this network?
d. What is the length of the critical path?
e. What is slack time at activity H?
f. What is the Late Finish of activity H?
g. If activity C were delayed by two time units, what would happen to the project duration?

(a) J; (b) 20; (c) A-B-G-I-J; (d) 30; (e) 5; (f) 24; (g) no impact.

Results
Task Early Start Early Finish Late Start Late Finish Slack
A 0 5 0 5 0
B 5 7 5 7 0
C 5 17 10 22 5
D 0 3 10 13 10
E 7 12 17 22 10
F 3 4 13 14 10
G 7 14 7 14 0
H 17 19 22 24 5
I 14 24 14 24 0
J 24 30 24 30 0
Project 30