Collecting release times before designing the round
The information needed is short but specific. For each room, when does the last booking end, when does the first one start, and is there a reliable gap in the middle of the day. Adding the seating capacity and the type of use gives enough to estimate the load. Half a page of this beats a detailed floor plan, because a floor plan shows where rooms are and not when they can be entered.
Patterns emerge quickly. Large lecture spaces often free up early and stay free; small tutorial rooms turn over constantly and are only reliably available at the end of the day. Amenities are never free but tolerate short interventions. Grouping rooms by availability rather than by corridor is what turns a timetable into a workable cleaning order.
