The Waterfall Model was 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 fully before the next phase can begin. This type of software development model is basically used for the project which is small and there are no uncertain requirements. At the end of each phase, a review takes place to determine if the project is on the right path and whether or not to continue or discard the project. hases of Waterfall Model in Software Engineering There are several phases in the waterfall model. They are briefly explained below. Let us understand the concept of Waterfall model with example of a banking application for illustrating the topic. Let us assume that the Citibank is planning to have a new banking application developed and they have approached your organization in the 1990’s. Requirements Gath...