In business organization system experts are responsible for developing IS or enhancing the existing system for business or opportunities. They coordinate all efforts to develop a successful system. A successful I.S is one which can meet the information need of concert parties a user is friendly and can operate smoothly in the environment for which is designed. A systematic, cyclic, multi step process is carried on by system specialist for developments of information system which is called (SDLC). The steps in SDLC are, system analysis, system design, system implementation, system operation.

1: SYSTEM ANALYSIS:

System analysis is the process of examine the existing system for improvement of investigation the environment for development new system. The reasons for system analysis are (a) to examine the existing system for solving a problem (b) to satisfy the new requirement for information or to (c) implement the new system.
The system analysis phase of SDLC represents the application of system approach to organization problem.

2: SYSTEM DESIGN:

System design is the development of specification for a proposed new system from the recommendation during system analysis. During this phase the design team produce working papers provides management with the prescription of system input, output and processing. After review the management can approve or disapprove the system. Some the tie minor changes are made to the designed system according to management specification.

3: SYSTEM IMPLEMENTATION:

The implementation phase is the period in which a designed system is placed for actual operations. Implementation deigns when management become satisfied with designed system.
Four major activities take place during implementation (1) equipment installation (2) programming (3) training and conversation (4) tasting.

4: SYSTEM OPERATIONS:

When system is implementation its operations are checked routinely to see its performance. This review enables the management to check as the system is meeting its requirements.
When running new system errors may occurs and these errors are removed by adjusting the system.
Sometime a smooth running system needs changes due to a change in environment factors such as a change in tax rate need changes in accounting system.
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