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.
Usage
ADM is used for scheduling activities in a
project plan
A project plan, according to the Project Management Body of Knowledge (PMBOK), is:
"...a formal, approved document used to guide both ''project execution'' and ''project control''. The primary uses of the project plan are to document planning ass ...
. 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 actual activity. The dummy task is added to indicate precedence that can't be expressed using only the actual activities. Such a dummy task often has a completion time of 0.
Use of ADM as a common project management practice has declined with the adoption of computer-based scheduling tools. In addition, the precedence diagram method (PDM), or activity-on-node (AON), is often favored over ADM.
[A Guide to the Project Management Body of Knowledge, 4th Edition: ANSI/PMI 99-001-2008 (copyright Project Management Institute, Inc. 2008)]
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 lines following this node can start.
See also
*
Precedence diagram method
*
Program Evaluation and Review Technique
The program evaluation and review technique (PERT) is a statistical tool used in project management, which was designed to analyze and represent the tasks involved in completing a given project.
First developed by the United States Navy in ...
References
Project management techniques
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