planning oral exams

[forstera]

Hello all,
I need to plan oral exams with the following constraints :

only 3 different topics (french, german, mathematics).
for each topic, to teachers'team
each team has its own room

according to the fact that we'll 48 students , the oral exams are only in one day. The studens have to pass their 3 exams and it must have min 1 hour between each exam.
I created the teachers'teams, the rooms and topics. But now I tried to create 48 activities but I can't configure a same activity to have a gap of 1 hour between two sessions. should I create students, maybe groups  instead of activities ?
thanks for your help
Best Regards
Arnaud 

[Liviu Lalescu]

Hello, Arnaud!

If I understand correctly, add 48 students sets, 3*48 activities, and for each 3 activities of a students set add a constraint min 1 gaps between activities (this forces at least 1 gap between each two activities - either empty or other activity/ies - if the activities are on the same day). Wouldn't this work?

You can also add constraints activities max/min simultaneous in selected time slots, so that teachers are not exhausted by too many/few students at once, and also constraints activities occupy max/min time slots from selection.

Maybe you could show us your file (or send it privately by email to me if it is private).

[forstera]

Hello Liviu,

thanks for your answer. I'll dig into what you said.

There will be only 1 student per activity ; that's why I was wondering if activities was necessary.

So I need to create 1 activity per student and per topics ?

thanks very much for your help
Best Regards
Arnaud

[Liviu Lalescu]

Yes, I think you need 1 activity per student and subject.

You are welcome 

[forstera]

Thanks very much Liviu,

I just received a new constraint .... pfff ... every students belong to a group (1 to 4) .

For each topic, 4 teachers and each teacher has to follow 1 group.

means :
topic  french -> Grp1 - Teacher#1
topic  french -> Grp2 - Teacher#2
...
topic German -> Grp1 - Teacher#5
topir German -> Grp2 - Teacher#6
...
then each student belong to 1 group and will have to pass his exam for each topic .

so, I can create a studen file with the group but can I attrib a teacher to the group, too ?

[Liviu Lalescu]

Do you know the exact students who belong to group X?

Yes, I think each activity will be: A(StX, Sbj, TchY). You can choose to add also subgroups as real students, but this is only optional.

As I said, if you want you can send your file.

Please let me know.

[forstera]

this is very king Liviu,
so here's the file.

The last constraint I've is the following :

a teacher need to have 3 exams consecutives then at least 1 gap
a student need to have a least 4 gaps between each exam.

Thanks so much !

[Liviu Lalescu]

You are welcome!

I attach what I did (the corrected CSV file and the .fet file). I corrected your CSV students file  (it is not perfect, but now it is usable).

Then I imported it in FET, and tried to add how you said. I added a single day and 12 hours per day. And two types of constraints. But there must be something wrong from me? Because it is too easy. I am waiting for your further problems/clarifications.

[forstera]

Thanks so much Liviu !

I started to analyse what you did. All students belong to a group and all teachers belong to a group, too.

in my file, the field Set gives me the student numer (2020-#02 ; 2020-#04 ; 2020-#09= .. etc
because I'll have to send to each student its number and a  timetable with  all the activities.

In the file you sent to me, that means that the subgroup is the student's number, right ?  in that file, there's the group number, so how can I attach this group the a teacher ?


here's what I get from my file ..

[Liviu Lalescu]

I understood wrongly that each group of students must have its activities at the same time. I need to add for each separate student his activities. So there will be 48*3 activities, not 4*3.

The structure of students I made will allow you to give each student his number and activities. But I will need to add 48*3 activities now, and the corresponding constraints.

In the file you sent to me, that means that the subgroup is the student's number, right ?  in that file, there's the group number, so how can I attach this group the a teacher ?

- I am not sure I understand, but I think that my mistake was adding activities together. I will try to fix this.

Please confirm: you have 8 rooms (F203-F212), one day per week (Mecredi), and 30 hour per day (08:00-16:30). And 4*3 teacher groups (which can be considered each one a single teacher)?

Please confirm: between 12:15 and 13:30 there are 5 free slots of break?

PS: You can use the latest FET official, not your custom version. I added room changes constraints in the official FET a long time ago.

[forstera]

Please confirm: you have 8 rooms (F203-F212), one day per week (Mecredi), and 30 hour per day (08:00-16:30). And 4*3 teacher groups (which can be considered each one a single teacher)?
-> yes, a teacher's group can be considered as a single teacher
-> yes right, but 2 rooms are for french, 2 rooms for german, 2 rooms for mathematics 1 room for english and 1 room is free if needed

Please confirm: between 12:15 and 13:30 there are 5 free slots of break?
-> yes, no exams here

PS: You can use the latest FET official, not your custom version. I added room changes constraints in the official FET a long time ago.
ok, i'll change, thanks

the constraints I still have are : every teacher's group has to make 3 exam (for french and german) ; 4 examns for mathematics and then has 1 gap break

[Liviu Lalescu]

OK, let me try my tricks and I'll come back to you.

[Liviu Lalescu]

I hope I managed it. Please see the attached file. You might want to even make the constraints stronger, if you want, to improve it, if it still can solve.

Please let me know.

[forstera]

Hello Liviu,

thanks very very much

Finally, I used mine because the following constraing was needed : we can not split a group of 3  activities between teachers in the same room.

I'll have to dig your solution because I think it's better than mine ...

here's my final solution, not perfect  - some things had to change manually but  I hope to prepear a good configuration for next year

[Liviu Lalescu]

because the following constraing was needed : we can not split a group of 3  activities between teachers in the same room.

Hello, Arnaud,

You are welcome!    I am sorry my solution was not good enough. Could you explain more throughly the sentence above? Maybe with an example?