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  Various Phases of SDLC

Introduction to Various Phases of SDLC

The system development life cycle consists of seven major phases:

1. Preliminary assessment

2. Feasibility study

3. Analysis

4. Design

5. Implementation and Testing

6. Maintenance

7. Review and Evaluation

Preliminary Assessment

The first phase of any project is the preliminary assessment. The base of this phase is recognition of needs for improving an information system or a procedure. This need leads to a preliminary survey or initial investigation to determine whether an alternative system can solve the problem. This brief investigation of the system   under consideration will be provided the organizations steering team and any project team as set of items of reference for more detailed work.

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Feasibility Study

As the initial investigation is completed. It leads to a more detailed investigation of the system. The conclusions of the initial become the inputs for the detailed study. We can also refer to the feasibility study as the detailed study or detailed investigation.  Feasibility study is called like because as in the first phase. We just check briefly about the problem related to the old system, and the need of the new system. So in this phase that initial survey is further expanded to more detailed feasibility study.

Analysis

When the feasibility study is completed and the control mechanism is in place. The projects team   concentrates on the analysis part.

Design

Within an understanding of the existing system and the requirements for the new system, the project team can address the design of the new system. System design is the most creative and challenging phase of the system development life cycle.

System design is the determination of the processes and data that are required by a new system.

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Implementation and Testing

After development the code of the system. It enters into the implementation and testing phase. The implementation phase is less creative than the system design. It is primarily concerned with user training, site preparation and file conversion. It is defined as:

Implementation is the acquisition and integration of the physical and conceptual resource that produce a working system.

Review and Evaluation

A review is conducted whether the system objective are begin met with the user requirements and what the problems in the smooth are running. Steps are taken to resolve them.  This is an audit by the designer for improvements through test data and audit trails.

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