The software development life cycle (SDLC) is the entire process of formal, logical steps taken to develop a software product. Software development is the process of developing software through successive phases in an orderly way. This process includes not only the actual writing of code but also the preparation of requirements and objectives, the design of what is to be coded, and confirmation that what is developed has met objectives. The software 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.
Typical phases of software development:
Development or Coding
The new system requirements are defined. The requirements of a desired software product are extracted. Based the business scenario the SRS (Software Requirement Specification) document is prepared in this phase. The purpose of this document is to specify the functional requirements of the software that will be produced by the SOS project group. The specifications are intended to guide the group through the development process.
Plans are laid out concerning the physical construction, hardware, operating systems, programming, communications, and security issues for the software. Design phase is concerned with making sure the software system will meet the requirements of the product. It should also ensure that the future requirements will also be addressed.
Development (or) Coding:
Programs are developed by the developers with the help of the design. The design is reduced to code by the software engineers.
Testing is evaluating the software to check for the user requirements. Here the software is evaluated with intent of finding defects.
Once the new system is up and running for a while, it should be exhaustively evaluated. Maintenance must be kept up rigorously at all times. Users of the system should be kept up-to-date concerning the latest modifications and procedures.