AON Diagram

The arrow diagram represents the interdependencies and precedence relationships among the activities of the project. An arrow is commonly used to represent an activity, with its head indicating the direction of progress in the project. Using events specifies the precedence relationship between the activities. An event represents a point in time that signifies the completion of some activities and the beginning of new ones. The beginning and end points of an activity are thus described by two events usually known as the activities terminating at the same event have been completed.

In network theory terminology, a directed arc represents each activity and a node represents each event. The length of the arc need not be proportional to the duration of the activity nor does it have to be drawn as a straight line.  

The below Network show my project’s flow: