In Agile, continuous integration and regression testing should be part of every iteration to ensure that the product is always in a potentially shippable state. These practices help catch issues early in the development process, preventing defects from accumulating and becoming harder to fix later. By integrating and testing frequently, the team ensures that new code works with existing code and that the product maintains its quality throughout the development lifecycle. This approach aligns with Agile principles of delivering working software regularly and maintaining high-quality standards throughout each iteration.

In agile methodology, particularly in Scrum, it is essential to focus on delivering value through iterative, incremental development. Rather than planning everything upfront for the entire 2-year duration, the focus should be on delivering small, manageable releases on a regular cadence, allowing for flexibility and adaptability based on feedback from stakeholders. This approach helps to ensure that the team remains responsive to changing requirements and can continually improve the product over time.