An iterative hub location and routing problem for postal delivery systems

Download
2003
Çetiner, Selim
In this study, we consider the Turkish postal delivery system and develop an effective solution approach for the combined hub location and routing problem where the location of hub nodes are determined, the nonhub regional postal offices are allocated to the hubs, and the optimal set of routes are determined for each hub. Since the realized post-routing distances between origin-destination pairs are different from those used in the hub-location model, we develop an algorithm that finds the route-compatible hub configuration and allocation paths. The algorithm is the one that iterates between the hub-location phase and a routing phase. Our strategy consists of updating the distances used in the first phase in order to produce a solution that contains the cognition of routes. Some special structures in the routed n etwork are also identified and used for improving the solution. Computational experience is reported.

Suggestions

A genetic algorithm for the uncapacitated single allocation planar hub location problem
Damgacioglu, Haluk; DİNLER, DERYA; Özdemirel, Nur Evin; İyigün, Cem (2015-10-01)
Given a set of n interacting points in a network, the hub location problem determines location of the hubs (transfer points) and assigns spokes (origin and destination points) to hubs so as to minimize the total transportation cost. In this study, we deal with the uncapacitated single allocation planar hub location problem (PHLP). In this problem, all flow between pairs of spokes goes through hubs, capacities of hubs are infinite, they can be located anywhere on the plane and are fully connected, and each s...
Hubbing and routing in postal delivery systems
Cetiner, Selim; Sepil, Canan; Süral, Haldun (2010-12-01)
We consider the combined hubbing and routing problem in postal delivery systems and develop an iterative two-stage solution procedure for the problem. In the first stage, hub locations are determined and postal offices are multiply allocated to the hubs. The second stage gives the routes in hub regions that alter the distances between points used in the hub-location problem. The procedure then iterates between two stages by updating the distances used in hubbing in order to produce a route-compatible hub co...
A maximal covering location model in the presence of partial coverage
Karasakal, O; Karasakal, Esra (2004-08-01)
The maximal covering location problem (MCLP) addresses the issue of locating a predefined number of facilities in order to maximize the number of demand points that can be covered. In a classical sense, a demand point is assumed to be covered completely if located within the critical distance of the facility and not covered at all outside of the critical distance. Since the optimal solution to a MCLP is likely sensitive to the choice of the critical distance, determining a critical distance value when the c...
The planar hub location problem: a probabilistic clustering approach
İyigün, Cem (Springer Science and Business Media LLC, 2013-12-01)
Given the demand between each origin-destination pair on a network, the planar hub location problem is to locate the multiple hubs anywhere on the plane and to assign the traffic to them so as to minimize the total travelling cost. The trips between any two points can be nonstop (no hubs used) or started by visiting any of the hubs. The travel cost between hubs is discounted with a factor. It is assumed that each point can be served by multiple hubs.
The min-max order picking problem in synchronised dynamic zone-picking systems
Saylam, Serhat; Çelik, Melih; Süral, Haldun (2022-04-01)
In both manual and automated warehouses, a combination of efficient zoning and picker routing plays an important role in improving travel time, congestion, and system throughput. This paper considers the order picker routing problem in a dynamic and synchronised zoning environment, where the items corresponding to each customer order are picked simultaneously in multiple zones, and zones may change between different orders. The objective is to minimise the maximum time of completing the picking activities i...
Citation Formats
S. Çetiner, “An iterative hub location and routing problem for postal delivery systems ,” M.S. - Master of Science, Middle East Technical University, 2003.