Which is a purpose of the 'managing a stage boundary' process?

The purpose of the 'Managing a Stage Boundary' process in PRINCE2 is to prepare the next stage plan and provide the project board with key information needed to make a decision on whether to continue with the project. This process involves reviewing the current stage's progress and the overall project status to ensure project viability before moving forward. References: PRINCE2® 7 Foundation Handbook and official training materials.