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I think I misunderstood.

Maybe the new constraint students max 1/2 activity tags per day from set?

It's difficult to explain this case.
Let me make it a little simpler, there are 3 teachers A, B, C, and I want in any session (morning/afternoon), there is at least 1 teacher who does not teach.
I can do the following
Create 2 rooms P1, P2 and let 3 teachers A, B, C all teach these 2 rooms, then any teacher will have a break in any session. However, I want a direct constraint (Because my current classroom constraint is overlapping)

Hello, pekuon,

I think you can use the constraint activities max simultaneous in selected time slots.

I've tried using this constraint, and haven't found a reasonable way yet
For example, teacher A has periods a1,a2,a3...; Teacher B has periods b1,b2,b3....; Teacher C has lessons c1, c2, c3...
And the condition is that in the mornings or afternoons from Monday to Saturday, a maximum of 2 out of 3 teachers A, B, C have class, then how can I be bound?

Hello Liviu!
I have a suggestion: Can you add a constraint so that in a set of n teachers there are 1, 2 or 3 teachers busy in a day/actual day. Thank you very much!

Hello Liviu!
My school has a supervisory team to manage students, with 3 teachers as supervisors. And the requirement is that in any class (morning or afternoon) there is a maximum of 2 out of the 3 teachers above having a lesson.
I can create 2 rooms, and assign the above 3 teachers to 2 rooms, then the conditions can be met. However, due to some other constraints, I am currently assigning 1 room to each class, so the above constraint cannot be used.
Therefore, it is desirable to have a constraint that at most a teacher among n teachers (pre-selected), has class on 1 morning/ or at most a teacher among n teachers (pre-selected), has class on 1 afternoon.
Thanks a lot

I am currently scheduling with many constraints; however, the school frequently changes the teaching assignments, which leads to frequent changes in the class periods. When class periods are changed, some constraints are lost compared to the old schedule. Therefore, I would like to have a button to export all constraints to CSV or Excel for easier tracking of any missing constraints later. Thank you very much, admin.

Sometimes I add constraints, resulting in an unscheduled schedule, but don't remember what the last constraint was.
- I want a binding change history
Thanks very much !

My school has 2 classes: morning and afternoon
Morning from period 1 to period 5, afternoon from period 6 to period 9
The teacher teaches both morning and afternoon
For example, teacher A has 12 morning classes and 16 afternoon classes.
Please guide binding to teach 3 sessions in the morning and 4 sessions in the afternoon.
Teacher A has at least 2 periods in the morning, the maximum number of empty classes in the morning is 1

you need to use "min hours daily" (it is for a "half" dayin the custom version. so you will get min 2 hours in the morning (and also in the evening or 0 hours, but not 1)

i think "min hours daily" use for a day, ex i set min 2 hours daily, it can set 1 hours in morning and 1 hours in the afternoon.

Also see the official FET, examples/Morocco/Hadkourt. It has tricks on how to use the official FET for Moroccan-like institutions. It is a bit more complicated than using the custom FET designed specially for Morocco.

--> Where i find it ? Thanks

Sorry for causing too much trouble.

I tried the morocco version, but in this version have " min morning per week for a teacher " and " max morning per week for a teacher ".
but i need :  " min hours per morning for a teacher ", and i set " 2"  that  each teacher teach at least 2 hours each morning

Also see the official FET, examples/Morocco/Hadkourt. It has tricks on how to use the official FET for Moroccan-like institutions. It is a bit more complicated than using the custom FET designed specially for Morocco.

He suggested usig the custom FET version. See:
https://lalescu.ro/liviu/fet/custom.html

Thanks, and i'l try custom version.

But if i Make the constraint min hours per day = 2, in one day, morning 1 hour, affternoon 4 hours. I need in the morning or affternoon >= 2 hours.

i have another question.
in fet have " min hours daily for a techer" but my school learn 2 session a day. and have case like picture.

this teacher have one hour a session, i want at least two hours a session.
THanks. my english very bad.

Sorry, my english is bad. So I use Vietnamese then google trans to english.
First. I want to export timecode to html file. I would like to have 2 items next to separate items, not combined. If so, then copy to excel will be more convenient.
Monday. My school is studying twice because there is not enough room. So for example, I have 15 rooms, 10 rooms in the morning, 5 rooms left. I want to take afternoon classes in the morning, so that I do not have more than 5 classes. So how do I install it?
Thanks for watching my post.

xin lỗi, tiếng anh của tôi rất tệ. Vì vậy tôi dùng tiếng việt sau đó google trans sang tiếng anh.
Thứ nhất. Tôi muốn khi xuất thời khóa biểu ra file html. tôi muốn 2 tiết xếp cạnh vẫn ghi riêng chứ không gộp chung lại. nếu được vậy thì khi copy sang excel sẽ thuận tiện hơn.
Thứ hai. trường tôi học 2 buổi vì không đủ phòng. vậy ví dụ tôi có 15 phòng, buổi sáng học hết 10 phòng, còn dư lại 5 phòng. giờ tôi muốn xếp các lớp buổi chiều đi học thêm vào buổi sáng, sao cho không xếp quá 5 lớp đi học. vậy tôi phải cài đặt như thế nào ạ.
Xin cảm ơn đã theo dõi bài của tôi.

[min]

I am sorry, but it is difficult to understand. Are you sure you need min, and not max? Students max days per week is available in FET, and you can put max days per week = 3.

Please write your problem in Vietnamese and I'll try to translate with Google Translator.

Your students have got only 10 hours?
In that example you can just do this:
FET -> Data -> TIme constraints -> Students -> Max day per week for a students set -> 10A5_HT need 100% only 3 days.

thanks for suporrt me. I use FET in Vietnames language and it have some wrong mistake while translate to Vietnamese.
i use English and done. Thanks very much.

sorry,i'm Vietnamese and my enlish is very bad. so i screenshot in soft to say.
ex :


10a5 have 10 hour and i want to arrangement in 2 day ( 4hours) and 1 day ( 2 hours). But in soft not have condition to do that.
So i want condition " Min day per weeks for a studens set". i set min day "4"  will arrangement in 3 day.
Sorry i can't say to you understand my case.
Thanks for read.