We would please need some help with our call to Gurobi optimizer. It is not such a difficult task actually and even had it been running in the first place. So we did get at some earlier point some fairly decent results, as expected. Ever since we tried to „optimize“ our optimization — and now the results we get are dissatisfying (to none).
It is a make-and-pack problem. There are six products that need to be produced on six machines (the ultimate task would be to get it running with eighteen products; we startet with a „light version“ and reduced the number of products to six). Now not every machine can not produce every product and it takes some time for every machine to convert so it can either produce or pack a certain different product. Those are pretty common kinds of constraints, we assume. And those are well reflected in our code.
In the first (running) version Gurobi returned as those decent results to be seen here:
After this we tried to add another constraint and enhance the number of products (to eighteen). Something went obviously a bit wrong there and it did not work any more.
Sadly we did not keep the first running version that gave as the desired result as we tried to go back. Now everything seems to be messed up a bit in our code. It can’t be a lot that is going wrong, but maybe someone with some experience would notice the mistake with his educated eyes?
We could of course present anyone the code in more detail, if needed (and I guess it would be needed for the assistance).
Thanks a lot in advance.
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