What is the difference between Waterfall and Agile?
Waterfall and Agile are not just two flavours of project management. They are two fundamentally different ways of dealing with uncertainty. If you understand that, the rest follows.
Waterfall: Linear and Sequential # Waterfall is a linear sequential life cycle model. The team only moves to the next phase if the previous one finished successfully. Requirements first, then design, then implementation, then testing, then deployment, then operation. Each phase has a hand-off and a sign-off. Each phase produces a document that the next phase consumes.