What is the Waterfall Model (Waterfall Methodology)?
It is mostly known as the traditional software development process model, widely used until now, and the most popular SDLC model and the one you should avoid to use. Moreover, it was the first introduced presentation of the software lifecycle.
You can read this Wikipedia page to know the waterfall model history.
The Waterfall Model is a linear sequential flow. In which progress is seen as flowing steadily downwards (like a waterfall) through the phases of software implementation. This means that any phase in the development process begins only if the previous phase is complete. The waterfall approach does not define the process to go back to the previous phase to handle changes in requirement.
In this article, we will discuss the advantages and disadvantages of the waterfall, should we avoid it? when to use it? and the waterfall model pitfall, and why I see it as the father of the SDLC models.