How can we place all activities?

Started by infoo_, February 10, 2023, 05:40:43 PM

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

infoo_

FET will not place three acts on same day altough we picked 5 or 6 activities for min days constraint?

Liviu Lalescu

Yes, exactly. It is documented somewhere (I think twice) in the help. A1, A2, ..., An, min 1 days between activities with 0%, FET won't place 3 activities (Ai, Aj, Ak) on the same day.

infoo_

Thanks!

Quote from: darkwindow on February 14, 2023, 11:43:10 PMI couldn't get any improvement from before. I deactivated some "not so important" constraints, so we should get better performance. I got even worse results. :-[


I deactivated activities whose (index = 1 && duration = 2) of courses 2A, 2B, 2C, 3C and 5C.

Then I created new activities of indexes = 4 or 5 with duration = 1 each, min days = 1, 0%, consecutive = no.

Then, for each new activity, I set "two activities are consecutive" for the first 2 subactivities.

But in all cases, it places 312 out of 368 activities, so 368 - 312 = 56...

The file is attached. Can someone take a look if I made a mistake, please?

Can someone help me with this, please?

infoo_

#108
Hello Liviu

Quote from: Liviu Lalescu on February 15, 2023, 02:47:55 PMYes, exactly. It is documented somewhere (I think twice) in the help. A1, A2, ..., An, min 1 days between activities with 0%, FET won't place 3 activities (Ai, Aj, Ak) on the same day.

I don't understand why 0%. Shouldn't be 95%, 99% or even 100%?

In the case I picked A1 (duration=2), A2 (duration=1), A3 (duration=1) for constraint min 1 days 0%, please correct me:

In one day can occur:
- A1 yes
- A2 yes
- A3 yes
- A1,A2 no
- A1,A3 no
- A2,A3 yes (correct me here)
- A1,A2,A3 no

If I'm correct, what is the difference between setting 0%, 99% or 100%?