If we have added two vehicles to fleet information having below settings :
Weight/volume : 30 and 20 respectively
Maximum weight of a order to be carried by a vehicle is 15 and 10 respectively
Now if I have 3 orders which need to be planned having weights 14,15 and 05 respectively and same or nearly same location, it will include only one vehicle having capacity 30 and will auto-route only two orders with 14 and 05 weight.
Now 1 vehicle is not used and 1 order is excluded. Same problem exists with more orders also.