Quality control is a reactive procedure that focuses on finding and fixing flaws with the final product after it has been delivered to customers. Quality assurance is a proactive procedure aimed at ensuring that quality requirements are met before a product or service is distributed to the public.

Quality Assurance vs. Quality Control: Choosing the Right Career Path | Coursera

https://www.coursera.org/articles/quality-assurance-vs-quality-control

Quality assurance vs quality control: Learn the differences, jobs, salaries, skills, qualifications, and job outlooks for both roles.