Basic Elements of System Development

System development is the extension of information system development. The term information system is used to denote the interaction between people whose working and communication activities are considered from the point of view of the exchange and processing of information within an organization, together with the relevant organizational arrangements. Our interest focusses on information systems in which computers form the technical core, along with their relevant application software. When we speak of software development in the present book, we invariably mean the process of manufacturing application software for use in an information system. Developing software involves drawing up models and encoding some of them in a machine-interpretable language. Software development is embedded in system development. The introduction of new or changed software in an information system results in changes in working and communication activities.