Room timetabling is how universities and colleges schedule teaching spaces against the academic timetable: lectures, seminars and labs allocated to rooms for a whole term at once, rather than booked ad hoc.
The friction appears around the edges: the same estate also needs ad hoc booking for meetings, society events and study space, and timetabled rooms sit empty whenever a class is cancelled. Pairing the timetable with live room booking and release rules recovers that hidden capacity.