Main difference: Agile focuses on iterative and incremental development, while the waterfall process described by Winston Royce in the 1970s follows a linear, sequential approach.
Explanation: The waterfall model, as outlined by Winston Royce, follows a step-by-step progression through phases like requirements gathering, design, implementation, testing, and maintenance. Each phase must be completed before moving on to the next, with little room for revisiting earlier stages once they're completed. In contrast, Agile methodologies promote iterative development, where the project is divided into small increments or iterations. Each iteration involves planning, execution, testing, and review, allowing for flexibility and adaptation throughout the development process. Agile emphasizes customer collaboration, responding to change, and delivering working software frequently, while the waterfall model tends to prioritize comprehensive planning and documentation upfront. This fundamental difference in approach makes Agile more responsive to changing requirements and better suited for projects with evolving needs.
