• Title/Summary/Keyword: Logistics Vehicles

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Vehicle Routing Problem with Time Windows considering Outsourcing Vehicles (외주차량을 고려한 시간제약이 있는 차량경로문제에 대한 연구)

  • Seong, June;Moon, Il-Kyeong
    • Journal of Korean Institute of Industrial Engineers
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    • v.32 no.2
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    • pp.91-97
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    • 2006
  • The vehicle routing problem with time windows (VRPTW) is an important problem in third party logistics and supply chain management. We extend the VRPTW to the VRPTW with overtime and outsourcing vehicles (VRPTWOV) which allows the overtime of drivers and the possibility of using outsourcing vehicles. This problem can be applied to third party logistics companies for managing central distributor-local distributors, local distributor-retailers (or customers), and a manufacturer. We develop a mixed integer programming model and a genetic algorithm. Computational results demonstrate the efficiency of the developed genetic algorithm. We also develop a decision support system based on this genetic algorithm.

Development of a Planning System for the Routing and Scheduling of Vehicles in Pickup and Delivery Services (수배송 서비스를 위한 운송계획 최적화 시스템 개발)

  • Choi, Ji-Young;Lee, Tae-Han;Lim, Jae-Min
    • IE interfaces
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    • v.19 no.3
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    • pp.202-213
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    • 2006
  • In this paper, we develop a planning system for the routing and scheduling of vehicles in pickup and delivery service such as door-to-door parcel service. Efficient routing and scheduling of vehicles is very important in pickup and delivery service. The routing and scheduling problem is a variation of vehicle routing problem which has various realistic constraints. We develop a heuristic algorithm based on tabu search to solve the routing and scheduling problem. We develop a routing and scheduling system installed the algorithm as a planning engine. The system manage the basic data and uses GIS data to make a realistic route plan.

A Study on the Reinforcement of the Combat Support System by the Platform Standardization of Military Vehicles (군 표준차량의 플랫폼 표준화를 통한 전력지원체계 강화연구)

  • Kim, Myungsup;Kim, Kitak;Jung, Dohyun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.23 no.3
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    • pp.247-253
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    • 2015
  • Platform standardization is widely used in commercial auto industries and other industries to acquire cost reduction as well as high reliability. This paper reviews some application examples and estimates expected effect of Korean army's platform standardization for combat system and combat support system. Also, military platform standardization based on utilization of commercial vehicles has been studied with the standard vehicles used in Korean army. It is estimated that outstanding results may be achieved if a dual platform, the public and military platforms, is utilized. So, when the strategy of the military transportation system is decided, "dual use" concept is necessary and this could maximize the effect of the military strategy reinforcement.

Dynamic Matching Algorithms for On-Time Delivery in e-Logistics Brokerage Marketplaces

  • Jeong, Keun-Chae
    • Management Science and Financial Engineering
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    • v.13 no.1
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    • pp.93-113
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    • 2007
  • In the previous research, we considered a logistics brokerage problem with the objective of minimizing total transportation lead time of freights in a logistics e-marketplace, in which a logistics brokerage agent intermediates empty vehicles and freights registered by car owners and shippers [7]. However, in the logistics e-marketplace, transportation due date tardiness is more important than the transportation lead time, since transportation service level is critically determined by whether the due date is met or not. Therefore, in this paper, we deal with the logistics brokerage problem with the objective of minimizing total tardiness of freights. Hungarian method based matching algorithms, real time matching(RTM), periodic matching(PM), and fixed matching(FM), are used for solving the problem considered in this paper. In order to test performance of the proposed algorithms, we perform computational experiments on a various problem instances. The results show that the waiting-and-matching algorithms, PM and FM, also give better performance than real time matching strategy, RTM, for the total tardiness minimization problem as the algorithms did for the total lead time minimization problem.

A green transportation model in reverse logistics network and its comparative assessment for environmental impacts (역물류 네트워크에서의 친환경 운송 모델 개발 및 환경영향평가 비교 분석)

  • Kim, Ki Hong;Shin, Seoung-Jun;Chung, Byung Hyun
    • Journal of the Korea Safety Management & Science
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    • v.17 no.3
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    • pp.239-246
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    • 2015
  • Enforced environmental regulations call for extending the domain of manufacturers' responsibility to the entire product life cycle. To comply with the environmental regulations, manufacturers have constructed reverse logistics networks to re-collect their leftover waste for recycling consumed resources. However, the operational activities associated with storage, loading and transportation processes within the networks inevitably impose environmental burdens. Particularly, the transportation process largely influences environmental performance due to perpetual uses of transportation vehicles. Therefore, there is a need to develop an environmentally-conscious transportation model that can efficiently manage the uses of transportation vehicles. Additionally, it is vital to analyze its significances of environmental performance to compare quantitatively it with existing models. This paper proposes a transportation model for improving environmental performance in a reverse logistics network. This paper also presents a case study to perform its comparative analysis using Life Cycle Assessment that evaluates potential environmental impacts of a product system.

Heuristics for Rich Vehicle Routing Problem : A Case of a Korean Mixed Feed Company (다특성 차량경로문제에 대한 휴리스틱 알고리즘 : 국내 복합사료 업체 사례)

  • Son, Dong Hoon;Kim, Hwa-Joong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.42 no.1
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    • pp.8-20
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    • 2019
  • The vehicle routing problem is one of the vibrant research problems for half a century. Many studies have extensively studied the vehicle routing problem in order to deal with practical decision-making issues in logistics. However, developments of new logistics strategies have inevitably required investigations on solution methods for solving the problem because of computational complexity and inherent constraints in the problem. For this reason, this paper suggests a simulated annealing (SA) algorithm for a variant of vehicle routing problem introduced by a previous study. The vehicle routing problem is a multi-depot and multi-trip vehicle routing problem with multiple heterogeneous vehicles restricted by the maximum permitted weight and the number of compartments. The SA algorithm generates an initial solution through a greedy-type algorithm and improves it using an enhanced SA procedure with three local search methods. A series of computational experiments are performed to evaluate the performance of the heuristic and several managerial findings are further discussed through scenario analyses. Experiment results show that the proposed SA algorithm can obtain good solutions within a reasonable computation time and scenario analyses show that a transportation system visiting non-dedicated factories shows better performance in truck management in terms of the numbers of vehicles used and trips for serving customer orders than another system visiting only dedicated factories.

Impacts of Automated Vehicle Platoons on Car-following Behavior of Manually-Driven Vehicles (군집주행 환경이 비자율차량의 차량 추종에 미치는 영향분석)

  • Suh, Sanghyuk;Lee, Seolyoung;Oh, Cheol;Choi, Saerona
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.16 no.4
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    • pp.107-121
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    • 2017
  • This study conducted a 3-stage survey and simulation experiment to identify the impact of vehicle platoons on car-following behavior of manually-driven vehicles. Vehicle maneuvering data obtained from driving simulations was statistically analyzed based on three measures including average speed, acceleration noise, and offset to represent the deviation of lateral movements. Results indicate that MV drivers tended to have psychological burden while driving in automated vehicle platooning environments, which resulted in different vehicle maneuvers. It is expected that the outcome of this study would be useful fundamentals in developing various traffic operations strategies for managing mixed traffic stream consisting of MVs and autonomous vehicles.

Multi-Criteria Decision Making Based Logistics Brokerage Agents (다기준 의사결정 기반의 물류중개 에이전트)

  • Jeong, Keun-Chae
    • IE interfaces
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    • v.16 no.4
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    • pp.473-484
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    • 2003
  • In this paper we deal with the logistics brokerage process in which a logistics agent intermediates between vehicle owners and shippers for matching empty vehicles and freights. Based on the Multi-Criteria Decision Making (MCDM) methodology, the proposed agent system matches the most preferred empty vehicle to the shipper and the most preferred freight to the vehicle owner. In the proposed agent system, an MCDM based sensitivity analysis is also used for supporting decision makers under negotiations. Among various MCDM methodologies, Analytic Hierarchy Process (AHP) is utilized in this paper. Although AHP is one of the most popular MCDM methodologies, AHP needs a number of pair-wise comparisons for assessing alternatives and hence may give excessive decision making burden to the decision makers. In this paper, in order to reduce the decision making burden, a preference function based estimation method is proposed. We can expect that the MCDM based logistics brokerage agent can be used as an efficient and effective tool for e-logistics marketplaces on the internet.

A Study on Concatenation of Air & Sea Logistics' Information Using Telematics System;Case of Inchoen u-City (텔레매틱스 시스템을 이용한 항공 및 항만 물류 정보 연계에 관한 연구;인천 첨단물류도시 대상)

  • Hong, Seung-Beom;Kim, Woong-Yi
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.15 no.4
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    • pp.100-107
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    • 2007
  • We proposed the concatenation of logistics' Information to constructing the intelligent logistics city that is to manage efficiently cargo distribution as providing at real-time information of cargo location trace and management through the Telematics/RFID. Case of the Incheon of the "Air Logistics Hub", this area is on an increasing trend on the quantity of cargo transport of the Air & Sea cargo system until 2006. As intelligent project of the Air's and the Sea's field is independently developed at each area, it is a problem on the concatenation of logistics' information such as freight location trace and management, operation management and route information of cargo vehicles. Therefore, we propose the advanced transport service model for the concatenating smoothly of Air & Sea cargo system. In this paper, we only manage the model of Air & Sea cargo system of the advance logistics city.

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A Study on the Composition of Optimal Supply Route for Follow-on Logistics Support which Considers the Degree of Combat Intensity (전투치열도를 고려한 후속 군수지원의 최적 보급로 구성에 관한 연구)

  • Kim, Ki-Tae;Cho, Sung-Jin
    • Journal of the Korea Institute of Military Science and Technology
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    • v.13 no.6
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    • pp.1091-1098
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    • 2010
  • Victory and defeat of the war depends on follow-on logistics support. The spending time of follow-on logistics support at combat area is greatly influenced by the degree of combat intensity. The main purpose of this study is to compose a optimal supply route for operational sustainability of combat unit at combat area using transport vehicles. This study suggests a composition of optimal supply route for follow-on logistics support which considers the degree of combat intensity. A mathematical programming model and a genetic algorithm suggest to minimize the total spending time of follow-on logistics support. The suggested mathematical programming model is verified by using CPLEX 11.1. This study computes supply route, total spending time, total travel distance, and the number of transport vehicle.