The precedence diagramming method depicts relationships between activities. The Precedence Diagram (AON diagram) shows activity relationships, and it is an important communication tool for stakeholders. The precedence diagram is made of rectangles known as nodes. These boxes show the project activities. An arrow connects two boxes and shows the relationship. The 4 types of logical relationships in the precedence diagraming method are:
Finish-to-Start (FS) dependency, Finish-to-Finish (FF) dependency, Start-to-Start (SS) dependency, and Start-to-Finish (SF).