An objective of the Managing Product Delivery process is to ensure that work on products is authorized and agreed with the team. This process involves the Project Manager providing Work Packages to the Team Managers, who then complete the work agreed upon within the defined tolerances. References: PRINCE2 Foundation official documentation and study materials.

Within the context of a PRINCE2 quality review meeting, the role of Chair is recommended and crucial.
The Chair's responsibility is to ensure that the review meeting is conducted methodically and remains focused on its objectives. This includes leading the discussion, ensuring that all issues are aired and discussed properly, and that the meeting runs within its allocated time. This role is distinct from that of the Project Manager, Assurance, and Producer.
PRINCE2 7 Foundation study guide and official documents.

Uncertainty in a project is identified, assessed, and controlled by applying the risk practice. This practice involves systematic risk identification, analysis, and management, ensuring that risks are properly understood and addressed through appropriate responses to protect the project objectives. References: PRINCE2 Foundation official guide and risk management section.

Risk tolerance is defined as the measurable threshold that represents the tolerable range of outcomes for each objective at risk. It quantifies the level of exposure to risk that an organization or project can withstand, helping to guide risk response planning and risk management strategies.
(PRINCE2 7 Foundation Handbook, AXELOS)

Both Quality Assurance and Project Assurance are independent of the project manager, and they both ensure that applicable standards are used in the project. Quality Assurance is typically an external function that checks the project is using the right processes, while Project Assurance is internal to the project and provided by the project board, ensuring that the project continues to align with its objectives and the organizational environment. References: PRINCE2 7 Foundation Handbook and official training materials.