History

The development of network analysis techniques more or less coincided with that of the digital computer. The early network analysis programs were, therefore, limited by the storage and processing capacity of the computer as well as the input and output facilities. The techniques employed mainly involved producing punched cards (one card for each activity) and feeding them into the machine via a card reader. These procedures were time consuming and tedious, and, because the punching of the cards...

Work breakdown structures

An examination of the project life cycle diagram will show that each phase can be regarded as a project in its own right, although each will be of very different size and complexity. For example, when a company is considering developing a new oil field, the feasibility study phase could be of considerable size although the main project would cover the design, development and production phases. To be able to control such a project, the phase must be broken down further into stages or tasks,...