Handling sub-projects or project phases

How are folks approaching setting up a schema for sub-projects or project phases? Essentially parent/child projects.

I could set these up as separate individual projects, but it would be nice to track them together. Also, the child projects inherit/share some of the same overarching data - it would be great to have that data maintained correctly and not duplicated each time.

Does anyone have an existing schema for this?

Apologies if this has been asked before, I searched but couldn’t see anything relevant.

Have you looked at the exisiting Phase entity?
Or did it not suit your needs?

I thought about the phase entity as an option. It’s not super well integrated into the rest of the schema from what I can tell. I’ll take another look, maybe I can adapt it.