Every zone has its own quiet hour
A continuously staffed office is not uniformly busy at every hour, even though it is never entirely empty. Operational areas peak around specific flight or shift patterns, meeting rooms empty at particular points in the cycle, and administration functions still follow something close to business hours even when the operation itself does not. Mapping those individually produces a set of usable windows that a single attendance would never find.
The result is a roster that looks unusual on paper but works in practice. One zone might be serviced in the early afternoon, another late at night, and a third in the pre-dawn period. Each is placed where that particular area is genuinely available, which produces better access and less disruption than trying to service everything at one time.
