In PRINCE2, the information about the quality requirements for a product is detailed in the product description. This document specifies the quality criteria, quality methods, and the responsibilities for achieving the required quality. References: PRINCE2 Foundation Handbook, Product Description section.

The Progress theme in PRINCE2 establishes mechanisms to control the project against its baselines by providing ongoing forecasts for the project's objectives and continued viability. This theme ensures that the project remains on track to deliver the expected outcomes and can adapt to changes when necessary.References: = PRINCE2 7 Foundation handbook and online resources

In PRINCE2, the requirements for a product should be captured early in the process, specifically when the project team realizes the need for that product. This approach ensures that the project delivers what is actually required and expected. Capturing requirements early helps in detailed planning and allows for effective quality management throughout the product's development and delivery phases.References:
(PRINCE2 7 Foundation Handbook, AXELOS)

The process used to define how baselines will be established and controlled is 'Initiating a Project'. During this process, the project's management strategies, including quality, risk, communication, and configuration management strategies, are defined. These strategies include how baselines for the project's products and plans will be established and controlled throughout the project lifecycle.References: PRINCE2 7 Foundation resources and study materials.

The Communication Management Approach in PRINCE2 defines how information should be sent to interested parties and how often this information should be communicated. It includes details on the methods and frequency of communication necessary to engage stakeholders effectively and ensure that everyone who needs to be informed about the project has the right information at the right time.References: PRINCE2 Foundation Manual