Quality management, if I understand PMBOK and ISO-9001 correctly, is all about the Plan-Do-Check-Act cycle, where we 1) plan what quality objectives are important for us and how they can be numbered, 2) let the team produce the results, 3) collect the numbers, and 4) compare them with our expectations and take corrective and preventive actions. In order to make this all happen, you need to turn your human resources in numbers. How do you do that in your software team, depends on many factors. But software business is the easiest one for that: most of our activities are easy to measure.

The entire video is here: https://www.youtube.com/watch?v=euEOroFEHWM