Agile and Waterfall are two widely used project management methodologies, each suited for specific scenarios https://www.tomtomtextiles.com/initiative-management-paradigms-comparing-adaptive-and-sequential-methods/. Waterfall follows a linear, sequential process where each phase (e.g., design, development, testing) is completed before moving to the next. It works well for projects with clear, unchanging requirements, like construction or manufacturing.