Dunbar's Number

If

Humans can maintain approximately 150 stable social relationships. Dunbar's result is about neocortex size and group size across primates — it is not about work teams. What engineering extrapolates from it is a separate argument: communication channels grow as n(n-1)/2, so past the size where everyone can still hold everyone else's context, added people go into coordination rather than output.

Then

When a team exceeds 7±2 people, split it. If "information-sharing meetings" start multiplying, that's the symptom of exceeding the cognitive limit.

Unless

Two-Pizza Rule / Team Topologies