Waterfall Design is a linear project management approach often used in software development. It consists of distinct phases, including requirements gathering, design, implementation, testing, and maintenance. Each phase must be completed before moving on to the next, making it easy to track progress and manage tasks. This method emphasizes thorough documentation and planning, which can help prevent scope creep. However, it may be less flexible than other methodologies, such as Agile, since changes in later stages can be challenging to implement. Overall, Waterfall Design is best suited for projects with well-defined requirements.