1 Project network diagram. A project network diagram is a schematic display of the
project’s activities and the logical relationships (dependencies) among them. Figures
6–2 and 6–3 illustrate two different approaches to drawing a project network dia-
gram. A project network diagram may be produced manually or on a computer. It
may include full project details or have one or more summary activities (ham-
mocks). The diagram should be accompanied by a summary narrative that describes
the basic sequencing approach. Any unusual sequences should be fully described.
The project network diagram is often incorrectly called a PERT chart (for Pro-
gram Evaluation and Review Technique). A PERT chart is a specific type of project
network diagram that is seldom used today.