An '''Arrowarrow Diagrammingdiagramming Methodmethod''' (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>
It is used for scheduling activities in a [[project plan]].
Use of the Arrow Diagramming MethodADM as a common project management practice has declined with the adoption of computer-based scheduling tools. The Precedenceprecedence Diagramdiagram Methodmethod (PDM) is often favored over the Arrow Diagraming MethodADM.
The Arrow Diagramming MethodADM is also known as the Activityactivity-on-Arrowarrow (AOA) method, it only show Finish finish-to Start-start relationship.
<ref>A Guide to the Project Management Body of Knowledge, 4th Edition: ANSI/PMI 99-001-2008 (copyright Project Management Institute, Inc. 2008)</ref>