Waterfall Model

There are different model in SDLC

Waterfall model

• The Waterfall Model was the first Process Model to be introduced. It is also referred to as a linear sequential life cycle model . It is very simple to understand and use. In a waterfall model, each phase must be completed before the next phase can begin and there is no overlapping in the phases.
• The Waterfall model is the earliest SDLC approach that was used for software development.
• The waterfall Model illustrates the software development process in a linear sequential flow. This means that any phase in the development process begins only if the previous phase is complete. In this waterfall model, the phases do not overlap.