Scrum defines these items in clear terms.
Each Role is clearly defined.
Boundaries are clearly defined.
Tasks are clearly defined.
The Authority granted each Role and Task is clear.
Fuzzy definitions for “BART” properties leads to all sorts of waste.
It is no accident Scrum is clear on these items.
In the military, when BART definitions are unclear, people can and do DIE.
In business, when BART definitions are unclear, people can and do CREATE TONS OF WASTE.
In personal relationships, when BART definitions are unclear, people can and do CREATE TONS OF DRAMA.
Learn about BART.
Warning: once you start defining and policing your personal Boundaries, you begin to see the effects of Repulsion and Attraction. You attract people that like clear Boundary definition, and you repel people who do not.
A great exercise is simply to try to get ONE Product Owner and ONE Backlog in a large organization, on any project in that organization. Here, you are attempting to implement Scrum, and actually, you are defining BART properties for a Role and a Task.
BART analysis explains a great deal, and does so with amazing clarity.
Watch how the drama-generating and waste-generating types run away … when you start, with BART.