Untis provides three different methods of allocating rooms:
| 1. | Manual room allocation in the scheduling dialogue, on the scheduling timetable or on the timetable (see chapter " Manual timetabling ") |
| 2. | Automated room allocation during optimisation |
| 3. | Optimised room allocation during room optimisation |
The automated room allocation function during optimisation attempts to optimise timetables not just from the class or teacher perspective, but also from the room perspective.
Untis may even schedule a lesson for a period where a suitable room is unavailable. The lesson is then displayed in the diagnosis window under "Subject room missing". To suppress this behaviour, set the room weighting of the specialist subject room to "4" (under master data) and the slider for "Optimisation of room allocation" in the weighting dialogue ("Scheduling | Weighting") on the "Rooms" tab to position 4 or 5 ("very important" or "extremely important"). Periods for which the optimisation tool is unable to find a suitable room will then remain unscheduled.

The room situation can be re-optimised without altering the class or teacher timetables (see section after next). This is useful when manual changes have been made to the scheduling of rooms and these changes are to be taken into account in other areas.