All software development methodologies such as the more commonly known waterfall and scrum methodologies follow the SDLC phases but the method of doing that varies vastly between methodologies. Additionally, it covers activities such as documentation and evaluation.
For example, Main System Development Life Cycle Phases As we covered before, the SDLC is used as a conceptual model that includes the procedures and policies necessary to develop or alter a system throughout a life cycle. It's important to have a system development life cycle in place because it helps transform an idea project into a functional and fully operational system.
Iterative methodologies, such as Rational Unified Process and dynamic systems development methodfocus on limited project scope and expanding or improving products by multiple iterations. Conduct the preliminary analysis: Discover the organization's objectives and the nature and scope of the problem under study.
Sequential or big-design-up-front BDUF models, such as waterfall, focus on complete and correct planning to guide large projects and risks to successful and predictable results.
These phases broadly speaking are, investigation, analysis, design, build, test, implement, and maintenance and support. Agile methodologies, such as XP and Scrumfocus on lightweight processes which allow for rapid changes without necessarily following the pattern of SDLC approach along the development cycle.