Studying this subject extensively, the most books state the following:
- Quality Assurance: prevention activity. Act of inspection, reviewing..
- Quality Control: testing
While there are some exceptions that mention that QA deals with just processes (planning, strategy, standard application etc.) which is IMHO much closer to real QA, yet I cannot find any good reference in Google Books.
I believe that inspections, reviews, testing is all quality control as it is about checking products, no matter if it is the final one or work products. The problem is that so many authors do not agree.
I would be grateful for detailed explanation, ideally with a reference.