Final answer:
A plan-driven process involves detailed planning and a sequential approach to development, while an agile process embraces change and focuses on iterative development and collaboration.
Step-by-step explanation:
The difference between a plan-driven process and an agile process lies in their approach to design and execution. In a plan-driven process, the entire project is carefully planned from start to finish, with a focus on detailed documentation and a sequential approach to development. This process is best suited for projects where requirements are stable and predictable. On the other hand, an agile process embraces change and focuses on iterative development and collaboration. It allows for flexibility and responsiveness to changing requirements and priorities. It is particularly effective in situations where requirements are uncertain or likely to change.