How to Establish Boundaries in a Business Domain

I mean, I just like basically started from the discussion from, well, there's an existing system point of view, right? If you want to help me understand that if you start from scratch, then I of course think you have to look at the organization and what kind of teams you already have. That is, and that kind of helps to describe the business objectives and what they want from the system or what they've built with the system. And then it's just a question of how to establish the boundaries in a way that they, that you can basically, good fences make good neighbors, right? You put them in place first, but might be able to also tweak and alter them