
7: Information systems
Objectives
After reading this chapter, you should be able to:
Φ outline the main phases in the life cycle of an information systems
project
Φ describe the tasks that have to be done to develop a model of an
information system
Φ explain the reasons for using modelling tools such as dataflow
diagrams, entity-relationship diagrams, data dictionaries, and process
specifications
Φ use in an elementary way some of the main modelling tools.
Scenario
Introducing computers into your organization can bring many
benefits. But if the wrong choices of software and hardware are
made enormous damage can be done. It is essential tha