The system development life cycle is the overall process of developing, implementing, and retiring information systems through a multistep process from initiation, analysis, design, implementation, and maintenance to disposal. There are many different SDLC models and methodologies, but each generally consists of a series of defined steps or phases.
The systems development life cycle (SDLC) is a conceptual model used in project management that describes the stages involved in an information system development project, from an initial feasibility study through maintenance of the completed application.
The SDLC in its Pure Form has These Phases.
1) Requirement Analysis: - This phase is also known as feasibility study. In this stage the Requirement is been gathered for the product to be developed. The gathered requirement is documented in a simple document which is known as the Software Requirement Specification.
The Requirement Analysis Phase ultimately ends up with the SRS.
2) Design Analysis: - The purpose of this phase is to plan out the solutions to develop the application that has been documented in the SRS. The design provides solutions to the problems from the Requirement Analysis Phase.
3) Coding/ Development: - This phase is where the actual coding takes place. This stage targets to develop the application using right coding standards and technology.
4) Testing: - This phase is where the code is tested and verified to match the requirement given in the SRS. The stage repeats itself until the code is ready to publish or distribute. The testing takes place in many methods which are Black Box Testing, White Box Testing, Unit Testing, and Integrated Testing etc...
5) Implementation and Maintenance: - This is a phase where the Tested code is distributed to the end user and the Application has to be maintained. This stage is the most time consuming Phase where the end user keeps on identifying bugs and the application has to be modified and updated.
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