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Please tell me, is this useful for you and you don't need teachers max hours daily with exceptions? Because teachers max hours daily with 1 days exception is too difficult for me.

I saw that you proposed last year max hours daily. So I want to ask you if max span per day is useful for you instead of max hours daily.

After I used it, I find max span per day with exceptions definitely a very useful constraint, even more that max hours daily with exceptions.

Hi Liviu,
I've been using FET 5.39.0-luca-snapshot-10-aug-2019-16_56 version with the "Allow one day exception plus one" checkbox checked on several "Add teacher max span per day" constraints in the last weeks and everything is working fine.
I don't know if this is a thorough test, but I think you can take into consideration to add it in the official version.
Again thank you so much for all your work!

Thanks Liviu,
in fact this is a problem I had with several teachers last year.
I'll do some tests with the custom version then I'll tell you.

I think there are two possible solutions, both using the same constraint type, activities occupy max time slots from selection:

Add not available/break Sat 6th, then:

1) One constraint for each primary students set: select all the slots other than Mon-Fri 5th, and add all activities of that students set, and max occupied so that the 5th slots Mon-Fri will always be occupied, all of them (see the constraint's help on how to do this).

2) One constraint for each primary students set, select these 6 slots: Mon-Fri 6th, and Sat 5th. All activities of this students set, max occupied = 1.

I hope I am not mistaking. Please let me know.

Thanks Liviu, solution 2 is working perfectly!

Thank you for your quick reply.

I'll try to give a better explanation.
Most of classes have the following timetable:
-MTWTFS
1oooooo
2oooooo
3oooooo
4oooooo
5oooooo
6xxxxxx

Anyway, to take advantage of the school gym some classes have a 6th period on a single day from Monday to Friday and in compensation they end Saturday lessons after 4th period, so they have a similar timetable:
-MTWTFS
1oooooo
2oooooo
3oooooo
4oooooo
5ooooox
6xxoxxx

In the past years, it was predetermined before the generation of the timetable which classes had a 6th period, so it was possible for them to set 5th period on Saturday unavailable.

Now, since Saturday is a "difficult" day, since it is requested as free day by many teachers, I would like to let FET decide the classes with a 6x5 timetable and the classes with a 6th period and a shorter Saturday.
Unfortunately, I am not able to force the 5th period to be always occupied from Monday to Friday, and FET produces class timetables with 5 periods on Saturday and 4 periods e.g. on Monday, which is not acceptable.

Hello, a problem. Classes can have six 5-period days or, as an alternative, Physical Education in the 6th period of a day (Monday to Friday), only 4 periods on Saturday and 5 periods in the other four days.
While it is easy to impose max one 6th period and possibly only PE in it, I can't find a constraint to make Saturday the shorter day.

Hello,
here is my problem: several teachers can work max 5 hours daily, but only once a week; in the other days the maximum is 4.
At the moment if in the generated timetable there is a teacher with two 5-hour days I add the constraint that all his activities occupy max 9 hours in those days, but the problem presents again in other days or other teachers and it would be very laborious to add the constraints for all the possible pairs of days.
Is there any alternative solution?