Civil Engineering Reference
In-Depth Information
Example 4.5
Draw the node diagram and perform the CPM computations for the schedule
shown next.
Activity
IPA
Lag
Duration
Activity
IPA
Lag
Duration
A
-
2
G
C
5
B
A
2
5
H
D, E
10
C
A
6
F
2
D
B
6
I
E, F, G
8
E
B
3
7
J
D
7
F
B, C
4
K
H, J
1
I
1
Solution
Performing forward and backward passes yields the solution shown in
Figure 4.11. The critical path in this example is A, B, E, H, K. Its length
is 2
+(
2
)+
5
+(
3
)+
7
+
10
+
1
=
30 days. The solution to example 4.5 is
summarized in the following table.
Figure 4.11 Lags in scheduling software
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