Ask AI: Waterfall model

The Waterfall model is a traditional software development methodology that follows a linear and sequential approach. It consists of a series of phases including requirements analysis, design, implementation, testing, deployment, and maintenance. Each phase must be completed before moving on to the next one. This method is suitable for projects where the requirements are well-defined and stable and there is little to no requirement for changes during the development process. However, one drawback of the Waterfall model is that it doesn't allow for much flexibility if changes are needed later in the process.