Diploma in Project Management – How to use the Arrow Diagramming Method (ADM)
Arrow Diagramming Method (ADM) is a method of constructing a project schedule network diagram that uses arrows to represent activities and connects them at nodes to show their dependencies.
The arrow diagramming method (ADM) approach to activity sequencing uses arrows to represent the activities.
The arrows are ―connected‖ on nodes. ADM only uses finish-to-start relationships. In some instances, dummy activities are required to express the logical relationship between two activities. A dummy activity is illustrated with a dashed arrow between the nodes.
The following illustration is a simple example of an ADM network diagram.
Simple Arrow Diagramming Method
ADM is an example of ―activity on arrow‖ (AOA) networks. This approach is not as popular as PDM, but may still be prevalent in some industries. ADM can be created manually or through a PMIS. Figure above shows a simple network logic diagram drawn using ADM.
This technique is also called activity-on-arrow (AOA) and, although less prevalent than PDM, it is still used in teaching schedule network theory and in some application areas.
ADM uses only finish-to-start dependencies and can require the use of “dummy” relationships called dummy activities, which are shown as dashed lines, to define all logical relationships correctly. Since dummy activities are not actual schedule activities (they have no work content), they are given a zero value duration for schedule network analysis purposes.
LMIT provides online training courses for the Cert IV Project Management BSB41507 and the Diploma of Project Management BSB51407 in Brisbane, Sydney, Melbourne, Perth, Adelaide and Canberra.
Published by: LMIT