Messages

Thank you for your work, Michael! I hope the users will benefit from your program.

Buongiorno,

I think you could use teacher(s)/students (set) activity tag max hours daily.

Oh, you can add: enter activities constraints, the constraints min days between activities, and click Add.

Unfortunately, this is a problem in FET. I was actually thinking of making teacher(s) max hours daily only with 100% and allowing a one day exception of +1, but it is very risky, I need to be very careful and test a lot, because some timetables might become impossible if I make a logic mistake.

You could try max hours = 5 (or 6) 100% and max hours = 4 99% (ignore the FET warning there, about weights < 100%). This is not perfect.

Perfect, but it is quite some work: to ensure a teacher has in any pair of days <= 9 hours, add a constraint activities occupy max time slots from selection for each pair of days: all the activities of that teacher, select Monday and Tuesday with X (red), max occupied = 9. The same for all possible pairs of days for this teacher. The same for all the necessary teachers. For a teacher, there are 10 constraints to add, if there are 5 days per week.

I will add your words in the TODO.

Yes, exactly! But it is a very complicated change, and I am only thinking of it for now.

Sorry, this is too difficult. But I'll add your suggestion in the list of suggestions (it was suggested by other users as well, in the past).

You have the constraints min gaps between activities and activities same starting day.

The groups of teachers will be used when adding constraints for more teachers. For instance, if you have 80 teachers and 50 must have max 1 gap per day, create a group of these 50 teachers and constrain only it, not individually.

Buonasera,

You could add either more min days between activities (A1=2,A2=2,A3=1,A4=1) -> (A1, A2), (A1, A3), (A1, A4), (A2, A3), (A2, A4), min 1 days 100%, or use teacher(s)/students (set) activity tag max 2 hours daily.

It might not be exactly what you need, but consider activities occupy min time slots from selection. Maybe you could use it.

Oh, if the min days between activities constraints are missing, the only way to add them is by Advanced -> Spread activities over the week.

Oh, then maybe the min days between activities constraints lost their "consecutive if on the same day". But note that FET won't put 3 subactivities on the same day (FET can put 2+1, if there are two subactivities with durations 2 and 1).

So, you can enter the min days between activities constraints and modify multiple constraints at once, or Advanced->Spread activities over the week.

Please let me know if this solves your problem.

I tried to generate your timetable, but I reached maximum 385/387. Is your file solvable?

About your problem, to compress 6 hours into 4, I am not sure I understand correctly the problem. I consider that you could have 1/3 of the activities to have no teacher and students, and they will somehow overlap. Maybe we could work on this idea.

In FET, it is absolutely impossible to have a teacher/students subgroup have two activities at the same time. But I hope my above approach might be useful.

I think you need to add teacher(s) max gaps per week/day.

It is impossible directly, but maybe we could use some tricks. I need to see your exact problem to understand it.