Lots has been written about management and leadership.
When something goes wrong, ask at the end, “Could our process, properly followed, have detected this situation?
From John Goodpasture and his quote from Alistair Cockburn...
... to “lead” already implies “change”. So a leader leads a change. (Somehow this thought had escaped my notice – had it escaped yours? It hit me pretty hard in the lecture.) If the leader in question is the PM, the person is leading a change in order to stabilize things (we can lead in order to increase stability). (This thought knocked my socks off.) ... and then the PM can “manage” the stable ongoing situation.