They've been divided up in essentially every way possible--but I've been doing this for 30 years. The only time I've had a division not work out fine is when a

They've been divided up in essentially every way possible--but I've been doing this for 30 years. The only time I've had a division not work out fine is when a company was bought out and teams/groups were split with no regard to expertise or experience. Even then, it didn't matter that much, because we still sat in the same places and could just talk to each other.