1. do not go to a building, that another cart is going to;
2. deliver from the closest building, that is full and therefore can't continue with production;
3. deliver from the closest building, that shortly will become full (internal storage filled in 80% and producing more);
4. deliver from buildings, that are filled in 60%, if it's the closest distribution center for those buildings;
5. deliver from buildings that have products with lowest stock in warehouse, except the buildings that are in range of the next level of production chain.