Waterfall Model

The waterfall model organises a project as a fixed sequence of phases that flow downward like a waterfall, each finishing before the next starts. Requirements are gathered and agreed up front, then a design is produced, then the solution is built, then tested, then released. The approach assumes the requirements can be well understood at the outset and will remain stable, so a great deal of planning and documentation happens early and the plan is then executed.

Waterfall’s strengths are predictability and clarity where those assumptions hold: fixed scope, well-understood requirements, and a need for thorough documentation, regulatory sign-off, or firm up-front cost and timeline commitments. Its weakness is rigidity. Because working output appears only late in the process and change is expensive once a phase is signed off, a misjudged requirement can surface too late to fix cheaply. This is precisely the failing agile was created to address, by delivering in small increments and welcoming change. Many real programmes are hybrids, running some parts sequentially and others iteratively.

For HR, talent, and GCC audiences, understanding waterfall matters for two reasons. First, plenty of HR work genuinely suits it — a payroll migration, a compliance rollout, or a physical centre build-out have fixed, sequential dependencies where a planned approach fits better than iteration. Second, the choice of delivery model shapes hiring: candidates and teams describe their experience in terms of waterfall or agile ways of working, and knowing the difference helps recruiters read a background accurately and match people to how a given organisation actually delivers.