Project Schedule Network Diagram Definition

A project schedule network diagram is a graphical representation of the relationships between project activities. It shows the sequence in which activities must be performed and the dependencies among them. The diagram is also known as a precedence diagram or a logic network.

Project schedule network diagrams are used to create project schedules and to assess the impact of changes on the schedule. They are also used to communicate the project schedule to stakeholders.

The most common type of project schedule network diagram is the arrow diagram, which uses arrows to represent the relationships between activities. Arrow diagrams are easy to understand and can be created using spreadsheet software such as Microsoft Excel.

Other types of project schedule network diagrams include:

-Activity on node (AON) diagrams: In AON diagrams, activities are represented by nodes, and relationships are represented by arrows. AON diagrams are more detailed than arrow diagrams and can be used to create detailed project schedules.

-CPM (critical path method) diagrams: CPM diagrams are similar to AON diagrams, but they also show the critical path—the sequence of activities that determines the shortest possible duration for the project. CPM diagrams are used to create detailed project schedules and to assess the impact of changes on the schedule.