Final answer:
The procedure described is most directly related to the quality control element of monitoring, which involves regular reviews and tests to ensure the quality control practices are effective.
Step-by-step explanation:
The procedure in which a quality control partner frequently tests the application of quality control procedures corresponds most directly to the quality control element of monitoring. Monitoring is one of the five elements of a quality control system as described by professional standards, and its purpose is to assess the effectiveness of quality control practices and procedures within a firm or organization. Regularly reviewing and testing these procedures ensures that they are being applied consistently and effectively, which helps in maintaining the quality of work.