What is the advantage of using the Waterfall methodology?

The Waterfall methodology (cascade model) has the following advantages:

• Clear structure and sequence of stages: requirements, design, implementation, testing, deployment, and support.
• Ease of project management due to fixed phases and control points.
• Easy to plan timelines and budgets, as all stages are defined in advance.
• Well suited for projects with clearly defined and stable requirements.

Thus, Waterfall is convenient when requirements do not change and strict documentation and control are important.