It is worthwhile repeating the relationships between the different levels of quality management.

We have a cascade arrangement:

Quality management, defining the overall policy of the organization towards quality, is over everything else.

Next comes quality assurance, which is the concept that ensures the policy is achieved.

GMP is part of quality assurance. It deals with the risks that cannot be tested. It builds quality into the product.

Quality control is a part of GMP. It is that part of GMP that is focused on testing of the environment and facilities, as well as the testing of the materials, components and product in accordance with the standard.