Looping occurs when an endless loop is created in a network diagram. Dangling refers to when an activity is disconnected from the network. Redundancy involves introducing an unnecessary dummy activity into the network.

1. COMMON ERRORS IN
NETWORK DRAWING
Eqbal Habibi
120633

2. 1. Looping
2. Dangling
3. Redundancy

3. Looping
A
Looping error is also called as cycling error in a network
diagram. Making an endless loop in a network is called as
error of looping.

4. Dangling
DA B
C
F
E G
Dangling
Dangling
Whenever an activity is disconnected from the
network it is called dangling error.

5. Redundancy
A
B
C
D
When the dummy activity is introduced and it is
not required, it is called redundancy errors.

6. A B C D