One timetable with different groups operating in different time

[Cyrus Ireri]

Is it possible under one file to create timetables that has different groups operate in different times e.g Grade 4-6 have their classes start at 8:00 and their sessions take 35 mins while grade 7,8 & 9 starts their at 8:20 and their sessions take 40 mins. Grade 4-6 do 7 sessions daily while 7,8 & 9 do 8. Their breaks are in different times.

[Liviu Lalescu]

I hope it is. Either define a FET hour = real 5 minutes, or add the hours in order: 8, 8:20, ..., and use the modern constraints of type teachers pair of mutually exclusive time slots.

[Cyrus Ireri]

Thanks for the reply. I use just have the times together then i use 2 unique constraints for the different grades then i add a constraint of min gaps between activities for teachers so that they will not have any collission. I think i will continue with this