Custom FET for Algerian schools

[Liviu Lalescu]

here is an example:
the student sets below do not have a fixed room:
3m1 - 2m1 - 2m2 - 2m3 - 2m4 - 2m5.
which has pushed us to extend the school time as described above(morning=4H; afternoon=4H), in order to be able to place their activities in the available space.

I am sorry, but I do not understand. But it is not a big problem if I don't understand. Because I can suggest you a quick fix: add an activity with duration 4 for each students set, preferred times afternoon each day. If you have a break during the afternoon, add two activities with duration 2 each instead and same starting day.

Yes, it is very useful to add max afternoons and max mornings for students but max afternoons is the most important because we can make the students study all the mornings but for the afternoons is not likewise.

This suggestion will stay here and maybe in the future I'll have the power, will, and time to do it. Until then, you might want to use my above trick.

[Benahmed Abdelkrim]

...
I am sorry, but I do not understand. But it is not a big problem if I don't understand. Because I can suggest you a quick fix: add an activity with duration 4 for each students set, preferred times afternoon each day. If you have a break during the afternoon, add two activities with duration 2 each instead and same starting day.

Good trick!
I missed it.
In this case it seems that there is no need to add the proposed constraint(s). At least now.
Thank you so much!

[Benahmed Abdelkrim]

...
I am sorry, but I do not understand. But it is not a big problem if I don't understand. Because I can suggest you a quick fix: add an activity with duration 4 for each students set, preferred times afternoon each day. If you have a break during the afternoon, add two activities with duration 2 each instead and same starting day.

Good trick!
I missed it.
In this case it seems that there is no need to add the proposed constraint(s). At least now.
Thank you so much!

Hmm ... And what about the rooms?
dummy rooms should also be added! ... and theirs space constraints!
A rather complicated trick !!

[Liviu Lalescu]

Hmm ... And what about the rooms?
dummy rooms should also be added! ... and theirs space constraints!
A rather complicated trick !!

I don't understand:

If the students have no home rooms, no rooms, no problems.

If the students have home rooms, they will be OK.

[Benahmed Abdelkrim]

We create dummy rooms to place dummy activities, Otherwise, the program will place these dummy activities in the rooms assigned to each student set,  Making the activities of student sets that do not have a home room  very difficult, if not impossible.

[Liviu Lalescu]

We create dummy rooms to place dummy activities, Otherwise, the program will place these dummy activities in the rooms assigned to each student set,  Making the activities of student sets that do not have a home room  very difficult, if not impossible.

No. If there are no home rooms for these students sets, dummy activities will be placed in an "UNSPECIFIED_ROOM", meaning no room.

Activities which have no preferred room(s) constraints or no home room(s) constraints will end up in no room.

[Benahmed Abdelkrim]

I think the problem is not well understood.
We are talking about a situation where groups of students do not have fixed rooms. Which forces us to move them from room to room to put their activities.
Spatial constraints must be used in this case. We have no other choice.

[Liviu Lalescu]

I think the problem is not well understood.
We are talking about a situation where groups of students do not have fixed rooms. Which forces us to move them from room to room to put their activities.
Spatial constraints must be used in this case. We have no other choice.

I insist that I am right, but I want to investigate, so do not give up 

The dummy activities do not need rooms. Just add dummy activities.

Please try practically. This is the best proof.

[Benahmed Abdelkrim]

Well you have to try!( See the example above)

When we use home rooms constraint, We then add dummy activities to specific student sets, This reduces the places to place activities of student sets that do not have a home rooms(Which are called mobile student sets) . To avoid this situation, we must create dummy rooms for dummy activities.

[Liviu Lalescu]

You know that example better than me. If we won't agree, I will try to run it, but I am very tired and my time is so limited.

But I think I understand. So the students have home rooms constraints? Then to apply my trick you need to add dummy activities, each one having a tag "Dummy" or whatever, and n_students_sets dummy rooms, and preferred rooms for activity tag "Dummy", select all the dummy rooms. Now I hope it is OK.

[Benahmed Abdelkrim]

You know that example better than me. If we won't agree, I will try to run it, but I am very tired and my time is so limited.

But I think I understand. So the students have home rooms constraints? Then to apply my trick you need to add dummy activities, each one having a tag "Dummy" or whatever, and n_students_sets dummy rooms, and preferred rooms for activity tag "Dummy", select all the dummy rooms. Now I hope it is OK.

So dear Liviu ...finally things have become clear.

[Liviu Lalescu]

You know that example better than me. If we won't agree, I will try to run it, but I am very tired and my time is so limited.

But I think I understand. So the students have home rooms constraints? Then to apply my trick you need to add dummy activities, each one having a tag "Dummy" or whatever, and n_students_sets dummy rooms, and preferred rooms for activity tag "Dummy", select all the dummy rooms. Now I hope it is OK.

So dear Liviu ...finally things have become clear.

You don't give up, do you    Neither do I 

Sorry for my mistake.

[Benahmed Abdelkrim]

...
You don't give up, do you    Neither do I 

Sorry for my mistake.

This happens sometimes. We don't blame ourselves. We sometimes have to take a rest.

[bachiri401]

Hello
too many demands will surely complicate things. I think now Fet Algeria41 is working succesfully and with just simple triks can solve all the problems. So ,I suugest that new constraints should be added one by one and testd by many users thourouly. Like this things will be clear . Mr LIVIU we are so sorry ! we tired you .

[Liviu Lalescu]

No problem, Mr. bachiri!   I will work as it is possible for me.