A network diagram can be created by hand or by using diagram software. There are two types of network diagrams, activity on arrow ( AOA ) and activity on node ( AON ). Activity on node diagrams are generally easier to create and interpret.
Types of Network Diagrams. There are basically two types of network diagrams that are used in developing a schedule. Arrow Network or AoA (Activity on Arrow) or ADM (Arrow Diagramming Method) Node Network or AoN (Activity or Node) or PDM (Precedence Diagramming Method) 1) Arrow Network or ADM (Arrow Diagramming Method)