Isn't it really just one person, the manager who permits it?
Informal design sketch review, peer code review, pair programming to mentor and induct. All processes that could be mandated by the manager, but work better from peers than down from on high.
We have all those people where I work and I have learned to know what questions to ask each of them to make sure they did the right things.
Quality cross group code reviews help identify this stuff fairly fast.