NETWORK (OR ARROW DIAGRAM)

A network is a graphical representation of inter-relationship of the various activities of a project. While drawing network, the following rules must be kept in mind.

  1. An activity cannot occur untill all activities leading to it are complete.
  2. No activity can start untill its tail event is reached.
Arrow Diagram
Activity Head Event Tail Event
1 - 2 2    (Burst Event) 1    (Burst Event)
1 - 3 3    (Merge Event) 1    (Burst Event)
2 - 3 3    (Merge Event) 2    (Burst Event)
2 - 4 4    (Merge Event) 2    (Burst Event)
3 - 4 4    (Merge Event) 3
4 - 5 5 4

The aforesaid graphical representation showing the inter-relationships ...

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