A team has stable, well-defined requirements and chooses a sequential process with clearly separated phases. Which model best matches this situation?

### Why this is right The waterfall model is a systematic, sequential approach suited to requirements that are well defined and stable. It progresses through phases rather than centering on repeated risk-analysis cycles or early prototypes. ### The concept Waterfall provides phase structure and defined inputs and outputs, which can help planning. Its limitation is that it is a one-way progression with little support for overlapping phases or delivering the system in pieces. ### The other options - **B. Spiral model**: Organizes repeated cycles around risk analysis. - **C. Prototype model**: Builds and revises a prototype to reach an acceptable version. - **D. Incremental model**: Delivers the system through increments rather than relying on one sequential delivery. ### Terms - **Waterfall life cycle model**: A sequential software process model. ### Remember Stable requirements and sequential phases point toward waterfall.