Can 2 unrelated activities switch places?

[infoo_]

Hello

Just a basic question:

Can we swap between two activities (maybe from different students sets and/or different subjects) of the same teacher without modifying other activities, if they are not related and/or not related with other activities constraints (such as activity preferred starting time, set of activities not overlapping etc.)? To achieve this, we add 2 constraints "an activity has a preferred starting time".

For example:

Before:

Teacher A teachs Math in 1A on Mondays on 1º and 2º hours. Also, Teacher A teachs Literature in 1B on Fridays on 5º and 6º hours.

After:

Teacher A teachs Math in 1A on Fridays on 5º and 6º hours. Also, Teacher A teachs Literature in 1B on Mondays on 1º and 2º hours.

Thanks in advance

[Liviu Lalescu]

Hello,

You just modify the 2 constraints activity preferred starting time.

[infoo_]

Hello

You just modify the 2 constraints activity preferred starting time.

Yes.

Would it be the same but now we exchange activities of different duration?

For example:

This swap would work:

Before:

Mondays 1º Teacher A - Arts - 1A
Mondays 2º Teacher A - Music - 1A
Fridays 7º Teacher A - Math - 1B
Fridays 8º Teacher A - Math - 1B

After:

Fridays 7º Teacher A - Arts - 1A
Fridays 8º Teacher A - Music - 1A
Mondays 1º Teacher A - Math - 1B
Mondays 2º Teacher A - Math - 1B


This would work? That is, will other activities have to be modified?

Before:

Mondays 1º Teacher A - Arts - 1A
Mondays 2º Teacher A - Music - 1C
Fridays 7º Teacher A - Math - 1B
Fridays 8º Teacher A - Math - 1B

After:

Fridays 7º Teacher A - Arts - 1A
Fridays 8º Teacher A - Music - 1C
Mondays 1º Teacher A - Math - 1B
Mondays 2º Teacher A - Math - 1B

[Liviu Lalescu]

I think that more activities will be rescheduled.

[infoo_]

I think that more activities will be rescheduled.

That's what I was thinking. So if same duration => no problem, if different duration => might be a problem (for sure).

[Liviu Lalescu]

You need to calculate the consequences of swapping. You might know better than me.

[infoo_]

You need to calculate the consequences of swapping. You might know better than me.

Of course!

For example, FET throws the following broken soft constraint:

Time constraint teachers activity tag 2C max 2 hours daily broken for teacher Teacher A, on day Martes, length=5. This increases the conflicts total by 0.9

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To avoid this, could I simply swap 6º and 7º 2C - Matemática to 1º to 2º? That is:

You cannot view this attachment.

[Liviu Lalescu]

I am sorry, but I cannot answer better than you. You know your file better than me. Just follow the logic

[infoo_]

I am sorry, but I cannot answer better than you. You know your file better than me. Just follow the logic

Oh my god... I've lost my mind. The example I'm showing doesn't tell anything about that other teachers (apart from Teacher A), can be teaching on the course that I was attempting to swap! Indeed, 3C is being instructed by another teacher on the slots that I'm attempting to swap.

Sorry for the misunderstanding

[Liviu Lalescu]

No problem!