The 'Plans' practice in PRINCE2 is essential for setting up the basis for project control. This includes monitoring, reporting, and responding to project progress in comparison to the planned objectives and outcomes. It ensures that the project stays on track in terms of scope, time, cost, quality, risk, and benefits, and provides a clear mechanism to gauge progress against the initial plan.References: = PRINCE2 7 Foundation Training Manual and official PRINCE2 website documentation

The guiding obligations and good practices which determine whether a project is genuinely being managed using PRINCE2 form the 'Principles' of the method. PRINCE2 is founded on seven principles that must be present in the project management approach to consider the project being managed using PRINCE2.
References: PRINCE2 Foundation manual, PRINCE2 official resources

Effective communication within a project in PRINCE2 focuses on ensuring that messages are clear, consistent, and reach the right stakeholders at the right time. This involves targeting key influencers who can aid in further disseminating information throughout the project, thereby enhancing communication efficiency and effectiveness.References: = PRINCE2 7 Foundation Training Manual and official PRINCE2 website documentation

The objectives of the 'Controlling a Stage' process in PRINCE2 include focusing on the completion of work within agreed tolerances and ensuring that all stage products meet the agreed quality expectations. These objectives are central to maintaining control over the stage and ensuring that the project delivers outputs that are fit for purpose.References: = PRINCE2 7 Foundation Training Manual and official PRINCE2 website documentation

The project board in PRINCE2 represents the three project interests, which are business (value for money), user (those who will use the project's outputs), and supplier (those who provide the resources and skills). The project board is responsible for overseeing the project, ensuring that it delivers value and meets the requirements set out by these three interest groups. References: PRINCE2 Foundation Handbook, Project Board section.