Site
A site in Omniscol represents a physical location where lessons take place. A site hosts classrooms and resources.
Do not confuse it with the campus, which is an organizational notion: branch, faculty, hub or internal grouping. The site carries the hours, the classrooms and the travel times; the campus is used rather for classifying and filtering.
Each timetable has at least one site. If all your buildings are in the same geographical place, a single site is enough. If your school spans several sites with instructors or students who move around, create as many sites as needed — and enter the travel time between them, otherwise the solver may teleport your teachers or your students.
Time grid at site level
Each site carries its own time grid (lesson times, breaks, lunch, closures). It is guessed automatically from the information entered, but should be customized by adding the breaks, the lunch break, the closures (Wednesday afternoon, Saturday).
Practical case: two virtual sites for the same location
A sometimes useful (but rare) configuration: creating two "virtual sites" for a single physical location shared between two entities (middle school + high school) that do not have the same time grid but share teachers. The travel time between the two virtual sites is then zero. Be careful to duplicate the shared classrooms in both sites and to enter exclusive opening hours (see classroom).
When to prefer two accounts over two sites
If two distinct schools have no instructor in common (or if the few shared teachers are assigned sequentially to one site then the other on well-defined days), it is often simpler to use two separate Omniscol accounts. Multiple sites become necessary as soon as there is a real circulation of instructors or students to model.
With Premium, another option is to publish two timetables active simultaneously on the same account (see Multiple active timetables in parallel), each corresponding to one site, rather than configuring two sites in a single timetable.
Whether with several accounts or several timetables in parallel, it is possible to share teacher and classroom occupancy, with cross-conflict detection (which the planner can disable). With several accounts, contact the Omniscol team to configure the link between them. Only operational, published timetables serve as the source for determining the occupancy of shared entities.