The Progress theme provides all management levels within the project management team with mechanisms for monitoring and control. This theme ensures that there are clear benchmarks for performance and mechanisms in place to assess progress throughout the project's life cycle. References: PRINCE2 Foundation Training Manual; PRINCE2 2017 Foundation handbook.

Explanation/Reference:
Reference http://prince2.wiki/Directing_a_Project#Objective

Among the six aspects of project performance that need to be managed according to PRINCE2, 'Progress' is a key component. The other aspects include costs, timescales, quality, scope, risk, and benefits. Managing progress involves monitoring and controlling how far along the project is in achieving its objectives and delivering its products. References: PRINCE2 Foundation official documentation and study materials.