sdlc software life cycle

software development life cycle (sdlc) is a process used by the software industry to design, develop and test high quality softwares. it aims to be the standard that defines all the tasks required for developing and maintaining software. the life cycle defines a methodology for improving the quality of software and the overall development process. planning for the quality assurance requirements and identification of the risks associated with the project is also done in the planning stage. this is done through an srs (software requirement specification) document which consists of all the product requirements to be designed and developed during the project life cycle. based on the requirements specified in srs, usually more than one design approach for the product architecture is proposed and documented in a dds – design document specification.

in this stage of sdlc the actual development starts and the product is built. if the design is performed in a detailed and organized manner, code generation can be accomplished without much hassle. the programming language is chosen with respect to the type of software being developed. once the product is tested and ready to be deployed it is released formally in the appropriate market. then based on the feedback, the product may be released as it is or with suggested enhancements in the targeting market segment. each process model follows a series of steps unique to its type to ensure success in the process of software development.

for example, a software has to be developed and a team is divided to work on a feature of the product and is allowed to work as they want. once the requirement gathering is done, an analysis is done to check the feasibility of the development of a product. in this phase, the requirement gathered in the srs document is used as an input and software architecture that is used for implementing system development is derived. in this model, the outcome of one phase is the input for the next phase. architecture, components of the product are created and documented in a design document.

system testing is performed in the system design phase. feedbacks are implemented and the prototype is again reviewed by the customer for any change. for example, feature to be developed in the iteration is decided and implemented. agile model is a combination of the iterative and incremental model. testing is done in each sprint to minimize the risk of any failures. example, in case of an unclear requirement, spiral and agile models are best to be used as the required change can be accommodated easily at any stage.

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