Supply chain excellence has a real huge impact on business strategy. Building supply chains (SCs) as flexible system represents one of the most exciting opportunities to create value. This requires integrated decision making amongst autonomous chain partners with effective decision knowledge sharing among them. The key to success lies in knowing which decision has more impact on the supply chai...

Multi-depot Location-Routing Problem (MDLRP) is about finding the optimal number and locations of depots while allocating customers to depots and determining vehicle routes to visit all customers. In this study we propose a nested Lagrangian relaxation-based method for the discrete uncapacitated MDLRP. An outer Lagrangian relaxation embedded in subgradient optimization decomposes the parent pro...

Emission reductions could be achieved by replacing the single-depot mode with a multi-depot of vehicle routing. In our study, we identified situations under which multiple depots used to effectively reduce carbon emissions. We proposed branch-and-price (BAP) algorithm obtain an optimal solution for green routing problem. Based on BAP algorithm, accurately quantified emission reduction potential...

Following the occurrence of unexpected events and natural disasters, a highly important relief operation is the transferring of relief commodities from the distribution centers (CDs) to shelters. In this paper, a three-level network consisting of depot of vehicles, distribution centers and shelters has been considered for routing and scheduling of relief vehicles through introducing a multi-obj...

Abstract The transport sector is responsible for 25% of global CO 2 emissions. To reduce emissions in the EU, a shift from currently 745,000 operating public buses to electric (EBs) expected coming years. Large-scale deployments EBs and electrification bus depots will have considerable impact on local grid, potentially creating network congestion problems spikes energy load. In this work, we im...

In this paper we consider closed loop two-echelon repairable item systems with repair facilities both at a number of local service centers (called bases) and at a central location (the depot). The goal of the system is to maintain a number of production facilities (one at each base) in optimal operational condition. Each production facility consists of a number of identical machines which may f...

Vehicle routing variants with multiple depots and mixed fleet present intricate combinatorial aspects related to sequencing choices, vehicle type choices, depot choices, and depots positioning. This paper introduces a dynamic programming methodology for efficiently evaluating compound neighborhoods combining sequence-based moves with an optimal choice of vehicle and depot, and an optimal determ...