Waterfall
Waterfall is a linear and sequential project management methodology commonly used in software development and other industries. It involves distinct phases such as requirements, design, implementation, testing, deployment, and maintenance, where each phase must be completed before the next begins. This approach emphasizes thorough planning and documentation upfront, with minimal flexibility for changes once a phase is finished.
Developers should learn Waterfall when working on projects with well-defined, stable requirements and low uncertainty, such as in regulated industries like healthcare or aerospace where compliance and documentation are critical. It is useful for large-scale projects where a structured, predictable process is needed to manage timelines and budgets, but it may not be suitable for agile or iterative development environments where requirements evolve frequently.