No timetable generated

[dydrich]

Good morning,
can anyone help me understanding why this file doesn't generate any timetable at all?
It works for hours, but gets stucked after about 200 activities every time.
I don't know how to fix it, so any help will be really appreciated.

Thank you

[Liviu Lalescu]

Hello, dydrich,

I am seeing your file. Indeed, I obtained 199, 200, or 201 placed activities out of 225.

Please tell me if you can relax some constraints. Maybe could we relax the two subactivities preferred time constraints, maybe instead of the subactivities with split index 1 (duration 2) for Scienze matematiche we could constrain the subactivities with split index 2 (duration 1)? Or allow them also to start at the second hour?

[Liviu Lalescu]

Hello again, dydrich,

I experimented. I think the difficult constraints are max 1 gaps per day, max hours daily, and interval max days per week.

I attach a file and solution with 50% max hours daily and deactivated interval max days per week. I hope I did not do other changes, because I tried in many ways.

I advise you to try in this direction, maybe by adding more constraints interval max days per week for individual teachers and increasing max hours daily percentage.

[dydrich]

Hello,

unfortunately some constraints are mandatory (max 1 gap per day and max hours daily)... As a last resort, I might try to finish the work by hand...

Anyway, thank you very much, I'll keep trying in that direction.

BTW, I love FET, it'a a fantastic software: I've used it for over ten years (and this is the first time I have this kind of problem).

[Liviu Lalescu]

Thank you for the appreciation!

I noticed something: teachers max 1 gaps per day and LettFC max 2 gaps per day. The second is ignored. You might want to add a constraint for each teacher and modify for LettFC. You can do that easily in recent FET versions.