“…However, the rich literature in this area focuses on highly aggregated models, which ignores the impact of queues and congestions, hence rendering these publications inapplicable for the problem considered in our paper. For example, in [28,13], the models do not go below the plant level. If transportation is considered at all, then it is considered either as traveling salesman type models (see for example [14]) or as very aggregated flows of commodity.…”