The waterfall model refers to a design process that is used in the development of software processes. Progress flows downwards through eight phases: conception, initiation, analysis, design, construction, testing, production, and maintenance hence the name ‘waterfall model.’ The waterfall model is commonly used because it saves on time and effort. This is achieved through consistent following of the eight phases, which ensures that each phase is complete before proceeding on to the next phase hence allowing for early detection of mistakes. The model is also preferred because it stresses documentation and a source code. This ensures that new members are able to access and read documents, thus enabling them to continue running programs with or without little guidance.
It is a simple approach and the fact that it is more disciplined than other models attract software engineers. It is simple in that it provides a structured approach through the eight phases mentioned above, which are always explained in an easily understandable manner. Apart from this, the phases enable users to mark milestones in the process of development. The model is suitable for stable software projects and in cases where designers are able to predict problem areas of the system and correct the design before moving on to the implementation stage. Hence, the model ensures the smooth running of the system.