Built Around Occupancy, Not the Other Way Round
Treatment gets scheduled floor by floor, wing by wing, or overnight, whatever fits how the hotel actually runs. Housekeeping know when we're coming. Reception don't have to explain anything to anyone. A guest in room 214 has no reason to know anything happened in 213 the week before.
That's the standard we work to. If a guest notices, something's gone wrong with how it was planned, not just how it was carried out.