Hi,

although there might be some people speaking German on this forum, I think you might have more chances for replies when you write your post in english

I asked ChatGPT to translate:

Hello, I have 3 products from 14 producers that need to be assigned to 3 destinations. However, I'm having trouble establishing the correct connection in the model.

For this, I have 3 sets. (K=products, i=producer, a=destination)

The first decision variable is used to calculate how many quantity units each producer produces. (Production variable)

These produced quantity units should then be delivered to the three destinations.

The problem is that the demand at the destination is controlled by k. But my production variable is controlled by i.

How can I model a connection so that AIMMS understands that i needs to be delivered, but the limit is set by k?

If needed, I can provide screenshots or the code.

Thanks in advance for any help!

Best regards,
Younes

Hi Younes,

Perhaps the course https://aimms.getlearnworlds.com/course/modeling-with-aimms-ii on our new training platform is interesting and provides you with a starting point of your model.

I'm not sure if there is something lost in the translation of the sentences: 

Admittedly, that formulation does not cater for handling multiple products. Typical reasons to consider multiple products are:

1. is there a production limitation,
2. is there a transport limitation,
3. something else,
4. or a combination of such restrictions?

If there is no such restriction, you can also consider solving the problem multiple times; once for each product.

Hope this helps,

Chris.