New features Min gaps between an ordered pair of activity tags for all Students

[henriquebelo]

Great, is impressive How fet can manage our constrains.

Many thanks
Henrique

[uni_instructor]

Dear Liviu,

I discovered the rather  "new" function "Modify teachers min gaps between ordered pair of activity tags" recently.
I tried it a little bit and its options but it does not seem to work as I am expecting.

Since I have sometimes problems creating time tables containing activities with different duration ( e.g. 6 hours vs. 2 hours)  with a defined minimum gap between both activities, I wanted to use that constraint to achieve an automatic minimum gap between such activities.
Therefore I defined tow different tags "LONG" & "SHORT" and tagged activities with a long or short duration.

Then I added the rule

Code Select Expand

Time constraint
All teachers must respect the minimum gaps between an ordered pair of activity tags
Weight (percentage)=100%
First activity tag=LONG
Second activity tag=SHORT
Minimum gaps=4

I set Minimum gaps=4 just to see a visible effect of that constraint.

I was expecting that FET creates a time table where two activities  (#1  tagged "short" , #2 tagged "long") are separated by at least 4 hours.
But most generated time tables show gaps < 4 hours!

I will send you a demo FET-file. (created by Version: 5.47.0 (September 2020))

Maybe you can reproduce that behavior.

Best regards

UI

[Liviu Lalescu]

Dear UI,

1) You need to add two constraints, one with (LONG, SHORT) and the other with (SHORT, LONG). But I see you added this in your private file.

2) In your private file, the last teacher has activities only with LONG.