Commissioning is not the moment the last display is powered. It is the moment a person who will use the room tries to do their job in it.
We tune speech, check the far end, walk the tracking, and run the macros with the host, the faculty member or the facilities lead in the chair. Levels that looked correct on a meter are revised because a voice in that room, with those finishes, needs something else.
Handover notes are short on purpose. If the operating story needs a chapter, the interface is still too long.