Why a fixed schedule fails against a timetable
A cleaning schedule assumes rooms are available at particular hours. A timetable assumes rooms are occupied at particular hours. When the second changes and the first does not, the cleaner arrives at a room in use, defers it, and moves on. Repeat that across a term and several rooms have been cleaned considerably less often than the schedule says and nobody records that it happened at all.
Nobody is at fault. The person setting the timetable has no reason to think about cleaning, and the cleaner has no way to know a booking has moved. The gap is entirely one of information, which means the fix is a communication arrangement rather than a scheduling change. Providers rarely raise this unprompted, so it is worth raising yourself and providers rarely volunteer it during a comparison.
