PREPARATION OF NETWORK INVOLVING USE OF DUMMY ACTIVITIES

Problem 6.56

Draw a network from the following activity and find critical path and total duration of project.

 

Activity Immediate Predecessors Duration (Days)
A 10
B 24
C A 14
D C 21
E D 14
F E 25
G E 10
H D 20
I B, D 8
J F, G, H, I 13
K J 4
L J 12
M K, L 4
N M 4

Solution

Activities and Duration of Project
Various Paths Duration of Paths
1 - 2 - 3 - 4 - 5 - 8 - 9 - 10 - 11 - 12 - 13 10 + 14 + 21 + 0 + 8 + 13 + 4 + 0 + 4 + 4 = 78
1 - 2 - 3 - 4 - 5 - 8 - 9 - 11 - 12 - 13 10 + 14 + 21 + 0 + 8 + 13 + 12 + 4 + 4 = 86
1 - 2 - 3 - 4 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 10 + 14 ...

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