The waterfall model is a traditional model used in the system development life cycle to build a system in a linear and sequential manner. The model is called a waterfall because it progresses methodically from one phase to the next in a downward direction.
Based on Winston W. Royce's requirements, the five-stage waterfall model separates development activities into the following project phases: analysis, design, implementation, testing, and operation.
The Waterfall model was the first SDLC approach utilized in software development. The waterfall Model depicts the software development process in a sequential linear flow. This indicates that any phase of the development process can begin only after the previous phase has been completed.
SDLC is an abbreviation for software development life cycle, which is a software development approach. The waterfall model separates project work into successive linear stages, each of which is dependent on the deliverables of the one before it and corresponds to a task specialty.
The following steps are included in this model: requirements analysis and specification, design, implementation, and unit testing, integration and system testing, and operation and maintenance.
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