Organisations use different kinds of information systems based on their requirements. These systems are designed with proper planning and care. This development of information system is called system development life cycle. In this system design there are many phases right from planning of the system to the disposal of that system . Different phases of SDLC are planning, analysis, execution,maintenance and disposal.
The system is properly planned taking all the available opportunities and threats into consideration. This plan will be the base for the development of the system. Then all the threats needs to be analysed and a route map is developbed. Th eplan is put into implementation and the system is built. After the completion of the system we need to maintain it regularly . When the system comes near the end of it's life we can dispose it and develop another.
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