How does QA fit in?
First, I want to reiterate Jeff Sutherland's concern, that he biggest problem is that too many teams are not getting to working product (working software) within a Sprint (a 1 to 4 week consistent timebox).
In my view, the absolute minimum Definition of Done for a typical software "story" or PBI (product backlog item) is:
* requirement defined
* unit tested
* functionally tested (aka acceptance tested)
* all identified bugs fixed
* reviewed by the Product Owner, and all 'problems' fixed
This is the minimum definition, assuming one starts with significant impediments. The ideal definition includes live, in production, being actively used by the customers with normal volume.
Now, let's add a key principle: The bad news does not get better with age. In other words, it is much cheaper to slow down and test and fix now (even though it does have some cost) than to not test in the Sprint and discover the bad news later (where the price is much higher).
So, our answer is that good professional testers must be in the Scrum team. Ideally that means 100% allocated to one team. At a minimum, 50% allocated to one Scrum team.
Where does QA fit in? Well, usually the testers are aka QA people. Sometimes QA means...read more