Project Management

SUMMARY: A project network diagram is a representation of all the project activities and the logical relationships among them. There are four types of relationships between any pair of activities. These are: finish to start, start to start, start to finish and finish to finish. The project network diagram helps the project manager in sequencing and scheduling project activities.

The project network diagram represents all the project activities, their estimated completion times and the sequence in which they are to be performed. The project manager can follow two methods in sequencing the project activities: Arrow Diagram Method and Precedence Diagram Method. Some conditional diagramming methods like GERT are also used.

The project manager estimates the duration of project activities based on similar activities of known duration, historical data, experts advice, Delphi method, Three Point Method and Wide Band Delphi method.