CHAPTER V
THE NETWORK FUNDAMENTALS
NETWORK CONVENTIONS
The making and reading of a network diagram
requires some familiarity of the network conventions.
One of the main features of PERT and CPM is their
use of network or presence diagram which is the
key In solving typical problems.
The NETWORK DIAGRAM is composed of a number
of ARROWS and NODES
They are two slightly different
conventions for making a network
diagram
1. ACTIVITY ON ARROW (AOA) – that is using arrows to
designate activities.
2. ACTIVITY ON NODE (AON) – using nodes to designate
activities.
The nodes in the AOA approach represents the
beginning and the end of activities, which are called
event.
Events are point in time. Unlike activities, they do not
consume either resources or time. Activities can be
referred to in two ways.
One is by their end points such as activity 1-2 and the
other is by letter assigned to an arrow such as activity
a,b,c, etc.
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