When is it time for integrating the solution in Scrum?

Integrating the solution in Scrum occurs during the Sprint because Scrum is designed to deliver increments of value on a regular basis. This incremental approach allows teams to integrate their work continuously, which is vital for ensuring that any changes made are functional and can be tested promptly.

Throughout the Sprint, Development Teams work collaboratively to build and integrate the product increment, ensuring that all features developed are cohesive and work well together by the Sprint Review. This practice enhances communication within the team and helps identify and resolve integration issues earlier in the process, leading to a higher quality end product.

In contrast, integration only after completion of the project or at the end of each phase delays valuable feedback and makes it more challenging to address any issues that arise during the development process. Planning meetings, while crucial for setting the agenda and aligning the team on goals, do not focus on actual integration of the product. Thus, the correct answer emphasizes Scrum's iterative nature, where integration is a continuous activity throughout the Sprint.