Agile methodologies often use which model that is based on iterations from user feedback?

The Spiral model is particularly aligned with Agile methodologies because it emphasizes a repetitive cycle of development that incorporates user feedback at each iteration. This iterative process allows teams to refine and enhance the product based on direct input from users, ensuring that the final output aligns more closely with user needs and expectations.

At its core, the Spiral model consists of multiple phases that include planning, risk analysis, engineering, testing, and evaluation, which all culminate in a prototype that can be tested and reviewed. This continuous feedback loop encourages a more flexible and adaptive development process, where changes can be integrated easily at various stages of the project, thereby resulting in a more user-centric product.

In contrast, the Waterfall model follows a linear and sequential approach that doesn’t accommodate user feedback until the later stages of development, which can lead to issues if the initial requirements were misunderstood. The V-model also adheres to a sequential structure where testing is only done after the development phase, limiting adaptability. The Incremental model does allow for feedback but doesn’t inherently include the rigorous risk management and iterative aspects that the Spiral model brings forth.

Thus, the Spiral model is most suitable for Agile practices because it facilitates a dynamic and responsive development cycle focused on user feedback.