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Arrow diagramming method

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Arrow Diagramming Method (ADM) is a network diagramming technique in which activities are represented by arrows.[1]

It is used for scheduling activities in a project plan.
The precedence relation between activities is represented by circles connecting to one or more arrows. The length of the arrow represents the duration of the relevant activity.

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

ADM example

Use of the Arrow Diagramming Method as a common project management practice has declined with the adoption of computer-based scheduling tools. The Precedence Diagram Method (PDM) is often favored over the Arrow Diagraming Method.

The Arrow Diagramming Method is also known as the Activity-on-Arrow (AOA) method, it only show Finish to Start relationship.

[2]

ADM network drawing technique the start and end of each node or event is connected to an arrow.

The start of the arrow comes out of a node while the tip of the arrow goes into a node. Between the two nodes lies an arrow that represents the activity.

The 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

References

  1. ^ CPM in Construction - A Manual for General Contractors(Copyright 1965 by the Associated General Contractors of America)
  2. ^ A Guide to the Project Management Body of Knowledge, 4th Edition: ANSI/PMI 99-001-2008 (copyright Project Management Institute, Inc. 2008)
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