Traditionally, QA focuses on testing the software before release into production to
see if it's ready for such release. But increasingly, modern QA organizations are also
focusing attention onto the software running in production. By analyzing logs and
other monitoring tools, they find quality problems to highlight to the development
organization. This approach works particularly well with organizations that use
continuous delivery to put new versions of the software into production rapidly and
reliably.
https://martinfowler.com/articles/qa-in-production.html QA in Production by Rouan Wilsenach 4 April 2017