4- time scaled network
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Tutorial # 4
Time Scaled
Network
King Saud University
College of Engineering
GE 404 Engineering Management
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The project network is plotted to a time scale as
a one dimensional line (similar to Gantt chart).
The horizontal length is equal to its estimated
time duration
(beginning at either its ES and/or
ending with its EF values).
TIME
-
SCALED
DIAGRAM
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Activity Predecessor(s) Duration
A - 4
B - 5
H A 5
G A,B 3
F H 4
E G,F 3
D E 2
C E 1
I D 5
J C,D 3
K - 2
L K,G 4
Example1For a small Engineering project listed below, Draw the Early Start
project schedule using Time- scaled network
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Activity Predecessor(s) Duration
A - 4
B - 5
H A 5
G A,B 3
F H 4
E G,F 3
Activity Predecessor(s) Duration
D E 2
C E 1
I D 5
J C,D 3
K - 2
L K,G 4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
A
B
H
G
F E
D
C J
K
I
L
Activity A H F E D I B G C J K L
FF 0 0 0 0 0 0 0 0 1 2 6 11
TF 0 0 0 0 0 0 5 5 3 2 17 11
Duration; 23 Critical path : A-H-F-E-D-I
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Act. Depends on Time Act. Depends on Time Act. Depends on Time
A None 4 D C, G 3 G F 4
B A 6 E None 3 H None 1
C B 7 F A, E 4 I H 5
Example2:For a small Engineering project listed below, draw the Early Start project
schedule using Time-scaled network , and determine the total & free float
and critical path.
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Act. Depends on Time Act. Depends on Time Act. Depends on Time
A None 4 D C, G 3 G F 4
B A 6 E None 3 H None 1
C B 7 F A, E 4 I H 5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
A
E
B
F
C
D
H I
G
Activity A B C D E F G H I
FF 0 0 0 0 1 0 5 0 14
TF 0 0 0 0 6 5 5 14 14
Duration; 20 Critical path : A-B-C-D