Stage Plans in PRINCE2 are essential tools for the Project Manager, assisting in the day-to-day management and control of the project. Each Stage Plan provides the detail needed for each management stage of the project, including what work will be done, when it will be delivered, and who will be involved, thus facilitating effective project governance on a stage-by-stage basis. They do not necessarily match the duration of the Project Plan or get produced simultaneously with the Project Initiation Documentation.
PRINCE2 7 Foundation handbook and other official documents.

The objectives of the 'Closing a Project' process in PRINCE2 include ensuring that provisions are made for ongoing benefit realization reviews (objective 1) and handing over any ongoing issues, including unresolved risks or threats, to operational maintenance or support teams (objective 4). This process is about wrapping up the project cleanly, ensuring that all project objectives related to closure are met, and preparing for the sustained realization of benefits post-project.
= PRINCE2 7 Foundation Training Manual and official PRINCE2 website documentation

The Project Board within the PRINCE2 framework is made up of three key roles: the Executive, the Senior User, and the Senior Supplier. These roles represent the business, user, and supplier interests respectively, ensuring that the project's decision-making is balanced across these three perspectives. References:
PRINCE2 Foundation official documentation and study materials.

The purpose of the 'Directing a Project' process in PRINCE2 is for the project board to exercise overall control over the project while delegating day-to-day management of the project stages to the Project Manager.
This process includes decision-making on project initiation and continuation, as well as providing overall guidance on policy and standards. References: PRINCE2 Foundation Training Manual; PRINCE2 2017 Foundation handbook.

In PRINCE2, a project benefit is defined as a measurable improvement that results from an outcome perceived as an advantage by one or more stakeholders. Benefits are the positive effects or gains yielded by the project, which contribute directly to the organization's objectives. References: PRINCE2 7 Foundation Handbook and official training materials.