I am performing an Vehicle Routing Problem with Time Windows in AIMMS.
The problem consists of 164 locations. I already expected that using all these locations would take a very long time. Therefore, I decided to divide this area into sub-areas.
I tested the model with 8 locations and for those locations I got a result. However, I am now doing the same for another area which consists of 18 locations and the computation time is very long. It stays at a gap of 38% and once in a while it decreases with 0,01%.
Now is my question is there something I can do about this as it seems that the model does work for smaller areas? If you need my model for this, please let me know to which address I can send it to as the data is confidential.