Can you explain the key features of the Waterfall model in software project management?

The Waterfall model is a classic approach to project management in software development, characterized by sequential execution of phases.

• Linear sequence: phases follow one after another — requirements gathering, design, implementation, testing, deployment, and maintenance.
• Clear phase separation: each phase is fully completed before moving to the next.
• Documentation: detailed documents are created at each stage, serving as a basis for the next.
• Minimal changes: changes in requirements after development has started are undesirable and difficult to implement.

This approach is well-suited for projects with clearly defined requirements and low likelihood of changes, but is less flexible when adaptation during the process is needed.