What does Software Development Life Cycle (SDLC) mean?
The software development life cycle (SDLC) is a framework defining tasks performed at each step in the software development process.
SDLC is a structure followed by a development team within the software organization. It comprises of a detailed plan describing how to develop, maintain and replace specific software. The life cycle defines a methodology for improving the quality of software and the overall development process.
The software development life cycle is also known as the software development process.
SDLC consists of following activities:
Planning: The most important parts of software development, requirement gathering or requirement analysis are usually done by the most skilled and experienced software engineers in the organization. After the requirements are gathered from the client, a scope document is created in which the scope of the project is determined and documented.
Implementation: The software engineers start writing the code according to the client’s requirements.
Testing: This is the process of finding defects or bugs in the created software.
Documentation: Every step in the project is documented for future reference and for the improvement of the software in the development process. The design documentation may include writing the application programming interface (API).
Deployment and maintenance: The software is deployed after it has been approved for release.
Maintaining: Software maintenance is done for future reference. Software improvement and new requirements (change requests) can take longer than the time needed to create the initial development of the software.
There are several software development models followed by various organizations:
Waterfall Model: This model involves finishing each phase completely before commencing the next one. When each phase is completed successfully, it is reviewed to see if the project is on track and whether it is feasible to continue.
V-Shaped Model: This model focuses on the execution of processes in a sequential manner, similar to the waterfall model but with more importance placed on testing. Testing procedures are written even before the commencement of writing code. A system plan is generated before starting the development phase.
Incremental Model: This life cycle model involves multiple development cycles. A working version of the software is produced during the first iteration, so working software is created early in the development process.
Scrum Model:Scrum lifecycle is a number of consecutive steps and iterative stages that should be performed during the realization of any Scrum project. The iterative approach is the main principle of Scrum lifecycle. The work on a Scrum project is subdivided into segments called sprints. The project develops from one sprint to another until the final product is ready. Each sprint is subdivided into several consecutive stages that it must pass from the beginning till the end. Scrum methodology also includes more specialized lifecycles like the testing life cycle and the defect life cycle.
The software development life cycle (SDLC) is a framework defining tasks performed at each step in the software development process. SDLC is a structure followed by a development team within the software organization. The life cycle defines a methodology for improving the quality of software and the overall development process.
A working version of the software is produced during the first iteration, so working software is created early in the development process.