Suppliers in Male often serve an atoll badly without knowing it, because each island was arranged separately by whoever was available.
We will take your delivery list and rebuild it as a route: which islands go together, which days, what the drop order should be, where the cold chain breaks, and what it costs per drop rather than per trip. It usually takes a fortnight of watching and one afternoon of arithmetic.
What we generally find is that a supplier is paying for three or four part empty trips a week where two full ones would do, and that the drop order was decided by which customer complained loudest.
We do this for suppliers whether or not they then use our boats, and we charge for it as a piece of work. The recommendation is sometimes to keep the arrangement you have and change the hours.