Arrow diagramming method

Arrow diagramming method (ADM) is a network diagramming technique in which activities are represented by arrows.. ADM is also known as the activity-on-arrow (AOA) method.

ADM is used for scheding activities in a project plan. Precedence relationships between activities are represented by circles connected by one or more arrows. The length of the arrow represents the duration of the relevant activity. ADM only shows finish-to-start relationships, meaning that each activity is completed before the successor activity starts.

Sometimes a "dummy task" is added, to represent a dependency between tasks, which does not represent any activity.

[[ImageThe event represented by the circular node consumes neither time nor resources.

• A node is a specific, definable achievement in the project.
• It has zero duration and consumes nil resources.
• All activities that lead into a node must be completed before the activity lies following this node can start.

See also

• Precedence diagram method
• Program Evaluation and Review Technique