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Importing Wikidata short description: "Network-diagramming technique in which activities are represented by arrows" |
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{{Short description|Network-diagramming technique in which activities are represented by arrows}}
{{refimprove|date=July 2016}} '''Arrow diagramming method''' (ADM) is a network diagramming technique in which activities are represented by arrows.<ref>CPM in Construction – A Manual for General Contractors(Copyright 1965 by the Associated General Contractors of America)</ref> ==Usage==
ADM is used for scheduling 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 (project management)|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.
[[Image:Arrow Diagramming Method.png|500px|ADM example]]
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.<ref>A Guide to the Project Management Body of Knowledge, 4th Edition: ANSI/PMI 99-001-2008 (copyright Project Management Institute, Inc. 2008)</ref>
ADM network drawing technique the start and end of each node or event is connected to an arrow.
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* 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
== See also ==
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{{Reflist}}
[[Category:Project management techniques]]
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