Download or read book Heuristics for the vehicle routing problem with multiple deliverymen written by Michael Huemer and published by GRIN Verlag. This book was released on 2013-09-02 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masterarbeit aus dem Jahr 2011 im Fachbereich BWL - Beschaffung, Produktion, Logistik, Note: Sehr gut, Karl-Franzens-Universität Graz (Produktion und Logistik), Sprache: Deutsch, Abstract: Der Hauptbestandteil dieser Arbeit ist das Testen verschiedener lokaler Suchoperatoren für eine Erweiterung des gutbekannten Vehicle Routing Problems. Diese erst vor kurzem eingeführte Erweiterung wurde notwendig um ein Routenplanungsproblem zu lösen, das daraus bestand, Getränke und Tabakwaren in dichtbesiedelten Groÿstädten in Brasilien auszuliefern. Es wurde nun versucht herauszunden, welche der VRPTW Operatoren geeignet sind, um das Vehicle Routing Problem with Time Windows and Multiple Deliverymen (VRPTWMD) möglichst gut zu lösen. Insgesamt wurden vier Operatoren implementiert, wobei Relocate und Ejection Chains auf die Routenminimierung abzielen und Cross bzw. 2-opt entsprechend die gefahrene Distanz verringern sollten. Um die Operatoren zu testen, wurden die benötigten Startlösungen mit der von Solomon entwickelten I1 Einfügeheuristik generiert. Die Erkenntnisse aus den Tests wurden schieÿlich dazu verwendet, eine best performance Variante zu entwickeln, welche anhand der Solomon Instanzen R101 bis R112 getestet wurde. Die Ergebnisse der Tests benden sich am Ende der Arbeit. The Vehicle Routing Problem with time windows is a well studied problem in literature. The extension to Vehicle Routing Problem with Time Windows and Multiple Deliverymen (VRPTWMD) has been proposed to solve a delivery problem of commodities, like beverages and tobacco in highly populated areas in Brazil. This rather new problem structure in the VRPTW context, is the main subject of the work. In this thesis, the aim is to nd out, which operators used for VRP are most suitable for the VRPTWMS. Relocate and Ejection Chain operators were tested for truck and deliverymen reduction, Cross and 2-opt were implemented to reduce distance. The Solomon I1 insertion heuristic was used to obtain starting solutions, for the tests and the nal version of the algorithm proposed. To complete this work, several tests have been performed and the results of the algorithm running Solomon R101- R112 instances can be found at the end.
Download or read book Metaheuristics for Vehicle Routing Problems written by Nacima Labadie and published by John Wiley & Sons. This book was released on 2016-02-23 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to metaheuristics as applied to vehicle routing problems. Several implementations are given as illustrative examples, along with applications to several typical vehicle routing problems. As a first step, a general presentation intends to make the reader more familiar with the related field of logistics and combinatorial optimization. This preamble is completed with a description of significant heuristic methods classically used to provide feasible solutions quickly, and local improvement moves widely used to search for enhanced solutions. The overview of these fundamentals allows appreciating the core of the work devoted to an analysis of metaheuristic methods for vehicle routing problems. Those methods are exposed according to their feature of working either on a sequence of single solutions, or on a set of solutions, or even by hybridizing metaheuristic approaches with others kind of methods.
Download or read book The Evolution of the Vehicle Routing Problem written by Bruce Golden and published by Springer Nature. This book was released on 2023-01-01 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents state-of-the-art research and practice in optimization routing, specifically the vehicle routing problem (VRP). Since its introduction in the late 1950s, the VRP has been a very significant area of research and practice in operations research. Vehicles are used to make deliveries and for pick-ups every day and everywhere. Companies such as Amazon, UPS, FedEx, and DHL use route optimization to reduce mileage, fuel use, number of trucks on the road, and carbon dioxide emissions. The authors compile and analyze 135 survey and review articles on vehicle routing topics published between 2005 and 2022 in an effort to make key observations about publication and trend history, summarize the overall contributions in the field, and identify trends in VRP research and practice. The authors have compiled published research on models, algorithms, and applications for specific areas, including: alternative and multiple objectives; arc routing and general routing; drones, last-mile delivery, and urban distribution; dynamic and stochastic routing; green routing; inventory routing; loading constraints; location-routing; multiple depots; pickup and delivery and dial-a-ride problems; rich and multi-attribute routing; routing over time; shipping; two-echelon, collaborative, and inter-terminal problems; specific variants, benchmark datasets, and software; and exact algorithms and heuristics. In addition, the book discusses how vehicle routing problems are among the most widely studied problems in combinatorial optimization due to the mathematical complexity and practical significance.
Download or read book Meta heuristics for the Vehicle Routing Problem written by Juan Song and published by . This book was released on 2005 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation involves the development and application of Meta-RaPS and its variation to the vehicle routing problem (VRP) and to the vehicle routing problem with time windows (VRPTW). It begins with the introduction and overview of these two problems and Meta-RaPS, focusing on the formulation of both problems. The latter part of the dissertation proposes one new construction method with several variants followed by an improvement method for VRPTW in Meta-RaPS. Finally the multi-objective characteristic of VRPTW is also discussed. The dissertation is divided into seven chapters, covering problems and heuristics background, formulation and the proposed heuristics. Chapter One gives a general introduction to the VRP and to the VRPTW, and also presents an overview of the current methods and technologies for both problems. Chapter Two explores the statements and formulations for both problems. Chapter Three gives the detailed introduction to MetaRaPS along with a description of the applications and advantages. Chapter Four lists the overview related to VRP, VRPTW, Meta-RaPS and related memory-based heuristic. Chapters Five and Six present the methodologies of the proposed algorithm for both problems. Specifically Chapter Five focuses on the algorithms for the VRP and Chapter Six emphasizes several modified algorithms for the VRPTW. The proposed algorithms are tested on a set of standard problems ( http://www.crpc.rice.edu/softlib/catalog/tsplib.html for VRP and http://elib.zib.de/pub/Packages/mp-testdata/vehicle - rout/index.html for VRPTW). Results, comparisons and discussions for both types of problems are also listed in both chapters.Chapter Seven gives the conclusions and directs the future work. The results show the advantages of the Meta-RaPS with the effective construction method and improvement method for both types of problems.
Download or read book The Single and Multiple Vehicle Pickup and Delivery Problem written by Gerald R. Armstrong and published by . This book was released on 1981 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pickup and delivery problem (PUDP) represents a class of sequencing or routing problems where the key facet of the routing is that a pickup must precede the corresponding, subsequent delivery. Other considerations such as service time windows, quality of service parameters or operational constraints on either the driver or the vehicle are possible. As such, the PUDP is a constrained version of the ubiquitous travelling salesman problem (TSP), which seeks a minimum cost route that from an initial point visits each city or stop once and only once, ending at the initial stop. There are also similarities between the PUDP and the much studied vehicle routing problem (VRP), although the two problems are distinctly different because of the origin preceding destination requirement.
Download or read book A Heuristic Algorithm for the Multi period Vehicle Routing Problem with Simultaneous Pickup and Delivery Service written by Liangyu Xu and published by . This book was released on 2010 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Vehicle Routing Problem Latest Advances and New Challenges written by Bruce L. Golden and published by Springer Science & Business Media. This book was released on 2008-07-20 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a unified and carefully developed presentation, this book systematically examines recent developments in VRP. The book focuses on a portfolio of significant technical advances that have evolved over the past few years for modeling and solving vehicle routing problems and VRP variations. Reflecting the most recent scholarship, this book is written by one of the top research scholars in Vehicle Routing and is one of the most important books in VRP to be published in recent times.
Download or read book Vehicle Routing written by Paolo Toth and published by SIAM. This book was released on 2014-12-05 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle routing problems, among the most studied in combinatorial optimization, arise in many practical contexts (freight distribution and collection, transportation, garbage collection, newspaper delivery, etc.). Operations researchers have made significant developments in the algorithms for their solution, and Vehicle Routing: Problems, Methods, and Applications, Second Edition reflects these advances. The text of the new edition is either completely new or significantly revised and provides extensive and complete state-of-the-art coverage of vehicle routing by those who have done most of the innovative research in the area; it emphasizes methodology related to specific classes of vehicle routing problems and, since vehicle routing is used as a benchmark for all new solution techniques, contains a complete overview of current solutions to combinatorial optimization problems. It also includes several chapters on important and emerging applications, such as disaster relief and green vehicle routing.
Download or read book Smart Delivery Systems written by Jakub Nalepa and published by Elsevier. This book was released on 2019-11-15 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart Delivery Systems: Solving Complex Vehicle Routing Problems examines both exact and approximate methods for delivering optimal solutions to rich vehicle routing problems, showing both the advantages and disadvantages of each approach. It shows how to apply machine learning and advanced data analysis techniques to improve routing systems, familiarizing readers with the concepts and technologies used in successfully implemented delivery systems. The book explains both the latest theoretical and practical advances in intelligent delivery and scheduling systems and presents practical applications for designing new algorithms for real-life scenarios. - Emphasizes both sequential and parallel algorithms - Uniquely combines methods and algorithms, real-life applications, and parallel computing - Includes recommendations on how to choose between different methods for solving applications - Provides learning aids, end of chapter references, bibliography, worked examples and exercises
Download or read book A Heuristic based Algorithm for Solving Multiple Supply Vehicle Routing Problems written by Tom Wilger and published by . This book was released on 1992 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constructive and Population Based Heuristics for the Vehicle Routing Problem with Multiple Trips written by Russell Jefferson Petch and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Composite Heuristics for a Class of Vehicle Routing Problems written by K. Ganesh and published by LAP Lambert Academic Publishing. This book was released on 2012-02 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle Routing Problem (VRP) is an area which has been widely dealt with for the last four decades. Methodologies have been developed for many variants of the VRP. This work considers concurrent and sequential delivery and pick-up in VRPs, encountered in practice but rarely considered in theory. In addition, constraints on maximum route length and on time-windows have also been considered. Mathematical models incorporating such features have been developed. While the NP-hardness of these problems mandates the use of meta-heuristics, recognition of inherent characteristics of the problem led to the development of construction heuristics based on cluster analysis to obtain good feeder solutions that speed up the intensive search at the end. Genetic Algorithms (GA), an enhanced version of Simulated Annealing (ESA) and a hybrid of the two are the meta-heuristics proposed for optimization. The heuristics performed exceedingly well in the evaluations, recording better or equally good results in comparison to the existing methodologies.
Download or read book A Tabu Search Heuristic for the Vehicle Routing Problem with Time Windows written by Jean-Yves Potvin and published by Centre for Research on Transportation = Centre de recherche sur les transports. This book was released on 1993 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes a tabu search heuristic for the vehicle routing problem with time windows (VRPTW). The tabu search incorporates an exchange heuristic which is specifically designed for problems with time windows. Computational results on the standard set of problems of Solomon are included at the end of the paper.
Download or read book Heuristic Solution Methods for Multi attribute Vehicle Routing Problems written by Alireza Rahimi Vahed and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Column Generation written by Guy Desaulniers and published by Springer Science & Business Media. This book was released on 2006-03-20 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Column Generation is an insightful overview of the state of the art in integer programming column generation and its many applications. The volume begins with "A Primer in Column Generation" which outlines the theory and ideas necessary to solve large-scale practical problems, illustrated with a variety of examples. Other chapters follow this introduction on "Shortest Path Problems with Resource Constraints," "Vehicle Routing Problem with Time Window," "Branch-and-Price Heuristics," "Cutting Stock Problems," each dealing with methodological aspects of the field. Three chapters deal with transportation applications: "Large-scale Models in the Airline Industry," "Robust Inventory Ship Routing by Column Generation," and "Ship Scheduling with Recurring Visits and Visit Separation Requirements." Production is the focus of another three chapters: "Combining Column Generation and Lagrangian Relaxation," "Dantzig-Wolfe Decomposition for Job Shop Scheduling," and "Applying Column Generation to Machine Scheduling." The final chapter by François Vanderbeck, "Implementing Mixed Integer Column Generation," reviews how to set-up the Dantzig-Wolfe reformulation, adapt standard MIP techniques to the column generation context (branching, preprocessing, primal heuristics), and deal with specific column generation issues (initialization, stabilization, column management strategies).
Download or read book Heuristics for Dynamic Vehicle Routing Problems with Pickups and Deliveries and Time Windows written by Penny Louise Holborn and published by . This book was released on 2013 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this thesis concerns the problem of dynamic vehicle routing. The motivation for this is the increasing demands on transportation services to deliver fast, efficient and reliable service. Systems are now needed for dispatching transportation requests that arrive dynamically throughout the scheduling horizon. Therefore the focus of this research is the dynamic pickup and delivery problem with time windows, where requests are not completely known in advance but become available during the scheduling horizon. All requests have to be satisfied by a given fleet of vehicles and each request has a pickup and delivery location, along with a time window at which services can take place. To solve the DPDPTW, our algorithm is embedded in a rolling horizon framework, thus allowing the problem to be viewed as a series of static sub-problems. This research begins by considering the static variant of the problem. Both heuristic and metaheuristic methods are applied and an analysis is performed across a range of well-known instances. Results competitive with the state of the art are obtained. For the dynamic problem, investigations are performed to identify how requests arriving dynamically should be incorporated into the solution. Varying degrees of urgency and proportions of dynamic requests have been examined. Further investigations look at improving the solutions over time and identifying appropriate improvement heuristics. Again competitive results are achieved across a range of instances from the literature. This continually increasing area of research covers many real-life problems such as a health courier service. Here, the problem consists of the pickup and delivery of mail, specimens and equipment between hospitals, GP surgeries and health centres. Final research applies our findings to a real-life example of this problem, both for static schedules and a real-time 24/7 service.
Download or read book Heuristics for New Problems Arising in the Transport of People and Goods written by Alan Lee and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Vehicle Routing Problem (VRP) and its numerous variants are amongst the most widelystudied in the entire Operations Research literature, with applications in fields includ-ing supply chain management, journey planning and vehicle scheduling. In this thesis,we focus on three problems from two fields with a wide reach; the design of public trans-port systems and the robust routing of delivery vehicles. Each chapter investigates a newsetting, formulates an optimization problem, introduces various solution methods andpresents computational experiments highlighting salient points.The first problem involves commuters who use a flexible shuttle service to travel to a maintransit hub, where they catch a fixed route public transport service to their true destina-tion. In our variant, passengers must forgo some of the choices they had in previous ver-sions; the service provider chooses the specific hub passengers are taken to (provided allrelevant timing constraints are satisfied). This introduces both complexities and opportu-nities not seen in other VRP variants, so we present two solution methods tailored for thisproblem. An extensive computational study over a range of networks shows this flexibilityallows significant cost savings with little impact on the quality of service received.The second problem involves dynamic ridesharing schemes and one of their most per-sistent drawbacks: the requirement to attract a large number of users during the start upphase. Although this is influenced by many factors, a significant consideration is the per-ceived uncertainty around finding a match. To address this, the service provider may wishto employ a small number of their own private drivers, to serve riders who would oth-erwise remain unmatched. We explore how this could be formulated as an optimizationproblem and discuss the objectives and constraints the service provider may have. Wethen describe a special structure inherent to the problem and present three different so-lution methods which exploit this. Finally, a broad computational study demonstrates thepotential benefits of these dedicated drivers and identifies environments in which they aremost useful.The third problem comes from the field of logistics and involves a large delivery firmserving an uncertain customer set. The firm wishes to build low cost delivery routes thatremain efficient after the appearance and removal of some customers. We formulate thisproblem and present a heuristic which is both computationally cheaper and more versatilethan comparative exact methods. A wide computational study illustrates our heuristic'spredictive power and its efficacy compared to natural alternative strategies.
