Effective issue and change control within a PRINCE2 project relies heavily on a configuration management system. This system tracks all items of the project, including their versions and changes, allowing for controlled changes and ensuring that all items are identified, accounted for, and monitored throughout the project. References: PRINCE2 Foundation official study guide and online 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 Quality Management Approach in PRINCE2 should provide guidance on how and when prototyping is to be used within the project. This approach outlines the quality techniques and standards to be applied and the responsibilities for achieving the required quality levels. Prototyping, as a method to validate product quality and user requirements early in the development cycle, falls under these guidelines.References:
(PRINCE2 7 Foundation Handbook, AXELOS)