What describes the Waterfall methodology?

The Waterfall methodology is accurately described as a sequential, activity-based process. This approach involves a structured and linear sequence of phases where each phase must be completed before moving to the next one. Typically, the phases include requirements gathering, design, implementation, verification, and maintenance. Once a phase is completed, it does not return to make changes without significant implications, reflecting the methodology's emphasis on planning and meticulous execution.

The Waterfall method contrasts markedly with more flexible or iterative approaches. It is ideal for projects with well-defined requirements where changes are minimal and not expected. The structured nature helps in establishing clear timelines and deliverables, which can be very effective in certain industries, particularly in construction and manufacturing, where steps must be followed strictly without room for overlap or revisions mid-process.