0000000000278360

AUTHOR

Richard F. Hartl

showing 2 related works from this author

The collaborative consistent vehicle routing problem with workload balance

2021

Abstract The rising competition in the logistics sector forces companies to be more economically efficient. One of the major sources of inefficiency is the incomplete usage of available resources, such as vehicles’ capacities. Mechanism that allow to better exploit such resources by enabling carrier collaborations are on the rise. Our study examines a centrally organized multi-period collaborative vehicle routing problem, where carriers can exchange customers who have to be serviced on a regular basis. Collaborations, where carriers serve frequent customers, are supposed to face the problem of (i) time consistency in terms of visiting time, and of (ii) service consistency. The latter ensure…

Service (business)050210 logistics & transportation021103 operations researchInformation Systems and ManagementGeneral Computer ScienceOperations researchconsistencyComputer scienceIterated local search05 social sciences0211 other engineering and technologiesWorkloadTime horizon02 engineering and technologycollaborationsManagement Science and Operations ResearchIndustrial and Manufacturing EngineeringConsistency (database systems)Order (exchange)routingModeling and Simulation0502 economics and businessVehicle routing problemmatheuristicsperiodic vehicle routing
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Heuristics for a Real-World Mail Delivery Problem

2011

We are solving a mail delivery problem by combining exact and heuristic methods. The problem is a tactical routing problem as routes for all postpersons have to be planned in advance for a period of several months. As for many other routing problems, the task is to construct a set of feasible routes serving each customer exactly once at minimum cost. Four different modes (car, moped, bicycle, and walking) are available, but not all customers are accessible by all modes. Thus, the problem is characterized by three interdependent decisions: the clustering of customers into districts, the choice of a mode for each district, and the routing of the postperson through its district. We present a t…

InterdependenceMathematical optimizationOperations researchHeuristic (computer science)Computer sciencemedia_common.quotation_subjectConstruct (python library)Routing (electronic design automation)HeuristicsSet (psychology)Cluster analysismedia_commonTask (project management)
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