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  What constraints count when placing courses?

All constraints count when placing courses:

Constraints related to the subjects:

• Subject incompatibilities: prevent having the same subject several times on the same day.
• Sequencing constraints: dictate that one course take place before another.
• Hourly maximums: limits the number of hours of a subject per day or week.

Constraints related to the teachers:

• Teacher unavailability: indicates the days or time slots when the teacher is unavailable to teach a course.
• Hourly maximums: limits the number of hours of course or presence per day, week, year.
• Preferential room: reduces constraints on course placements by not fixing a teacher's courses to a specific room.

Constraints related to the classes:

• Class unavailability: that indicate the days or time slots in which the class should not have a course.
• Hourly maximums: limits the number of hours of course per day or week.

Constraints related to the rooms, sites, etc.:

• Room unavailability: indicates the days or time slots when a room is unavailable.
• Site constraints: impose travel times that must be adhered to and/or a maximum number of site changes per day.
• Rooms groups: ensure that several courses requiring the same type of room (for example, language lab) are not scheduled at the same time if there are not enough rooms available.

Constraints related to the functioning of the institution:

• Lunch break: to be observed within a defined time slot.
• Inter-class break: minimum time intervals between two courses.
• Breaks: times during which courses should not be scheduled.