During the 'Initiating a Project' process in PRINCE2, it is the responsibility of the project board to specify the required level of management control. This includes defining how the project will be managed, monitored, and controlled throughout its lifecycle. The project board ensures that the project remains viable and that management decisions are made with the appropriate level of oversight.
= PRINCE2 7 Foundation handbook and online resources

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.

A Project Brief is produced to provide a full and firm foundation for the initiation of a project. This document outlines the project's objectives, scope, constraints, expected benefits, and structure of the project management team. It serves as the basis for the next process, Initiating a Project, where more detailed planning and definition of the project take place.
PRINCE2 7 Foundation handbook and official documents.

When the project board reviews whether the investment remains justified as the project progresses, this application of the 'manage by stages' principle is evident. This principle ensures that at the end of each stage, the project board reassesses the business case and the viability of the project before deciding to continue with the next stage.
PRINCE2 7 Foundation resources on the 'manage by stages' principle.

Part of quality control within PRINCE2 involves undertaking quality reviews. These reviews are essential for ensuring that the project's outputs meet the required quality standards and are fit for purpose, aligning with the defined quality criteria set out in the product descriptions. References: PRINCE2 Foundation Training Manual; PRINCE2 2017 Foundation handbook.