What features exist in projects implemented using the waterfall methodology?

Rigid planning and sequential execution of phases (requirements gathering, design, development, testing, deployment, support).

Lack of flexibility to changes in requirements after the phase has started.

Long development cycle.

Testing begins only after the development phase is completed.

High risk of discovering serious defects at late stages.

Large volume of documentation created at each phase.

Suitable for projects with clearly defined and stable requirements.