**6.1 Network diagram**

Network diagrams have evolved as a de facto standard for building project schedules because of their emphasis is on activity dependencies. They depict entire projects, or subprojects, as visual maps that portray activities in their required order of execution. These diagrams can be developed in one of the following two forms:


AOA diagramming is almost never seen today in popular software programs due to the fact that additional memory is needed to program the dummy activities.
