LogisticsLab/NWF is designed for solving Network Flow Problems that can be modelled as minimum-cost flow problems.
A typical Network Flow Model is the Transhipment Problem. Logistical networks (e.g. distribution networks) often
contain so called transhipment nodes beside sources and destination.
A transhipment node has to assemble or divide the incoming shipments into the outgoing shipments.
That means the incoming quantity has to be equal to the outgoing quantity.
A transhipment model is intended to organise an optimal supply of a homogeneous good between a set of
sources (origins, suppliers), a set of transhipment nodes and a set of sinks (destinations, customers)
in order to minimise the total transportation cost (or distances, times, etc.).