In order to be competitive companies need to take advantage of synergetic interactions between different decision areas. Two of these are related to the distribution and inventory management processes. Inventory-Routing Problems (IRPs) arise when inventory and routing decisions must be taken simultaneously, which yields a difficult combinatorial optimization problem. In this paper, we propose a...

We consider a single item Production-Inventory-Routing problem with a single producer/supplier and multiple retailers. Inventory management constraints are considered both at the producer and at the retailers, following a vendor managed inventory approach, where the supplier monitors the inventory at retailers and decides on the replenishment policy for each retailer. We assume a constant produ...

This study formulates a two-objective model by individually minimizing shipping costs and inventory costs to decide whether to route a shipment through a hub or directly to its destination. First, shipping and inventory cost functions are formulated for a multi-port calling route. Shipping costs include capital and operating cost, fuel cost and port charge, while inventory costs include waiting...

In this research work an analytical model has been proposed, for finding new distribution passage from the suppliers to the geographically scattered dealers and to deal with the pricing problem. Since the result for this model is a non-polynomial problem, tabu search that uses various surrounding approaches has been employed to provide gratifying results. Rate fixing and request claiming are ne...

The production routing problem (PRP) combines the lot-sizing problem and the vehicle routing problem, two classical problems that have been extensively studied for more than half a century. The PRP is solved in an attempt to jointly optimize production, inventory, distribution and routing decisions and is thus a generalization of the inventory routing problem (IRP). Although the PRP has a compl...

I this paper, we present a solution approach for the inventory-routing problem. The inventory-routing problem is a variation of the vehicle-routing problem that arises in situations where a vendor has the ability to make decisions about the timing and sizing of deliveries, as well as the routing, with the restriction that customers are not allowed to run out of product. We develop a two-phase a...

Following the International Maritime Organization (IMO), in order to safeguard realization of Paris Agreement on climate protection, greenhouse gas (GHG) emissions have be reduced by 50% year 2050. This objective shall reached decarbonization maritime traffic, which is why ship operators currently increasingly search for alternative fuels. Moreover, since start Ukrainian war February 2022, this...