• 산업경영시스템학회지
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• 제47권2호
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• pp.168-175
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• 2024

Due to the complexity of urban area, the city vehicle routing problem has been a difficult problem. The problem has involved factors such as parking availability, road conditions, and traffic congestion, all of which increase transportation costs and delivery times. To resolve this problem, one effective solution can be the use of parcel lockers located near customer sites, where products are stored for customers to pick up. When a vehicle delivers products to a designated parcel locker, customers in the vicinity must pick up their products from that locker. Recently, identifying optimal locations for these parcel lockers has become an important research issue. This paper addresses the parcel locker location problem within the context of urban traffic congestion. By considering dynamic environmental factors, we propose a Markov decision process model to tackle the city vehicle routing problem. To ensure more real situations, we have used optimal paths for distances between two nodes. Numerical results demonstrate the viability of our model and solution strategy.

• 디지털콘텐츠학회 논문지
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• 제18권1호
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• pp.101-108
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• 2017

기존의 공용 무인 택배함에서는 비어있는 보관함이 없다면 사용 할 수 없고 기존의 개인 무인 택배함에서는 자물쇠 기반의 택배함이라서 보안에 상당히 취약하였다. 이러한 단점을 예방하기 위해서 제안된 무인 택배함은 스마트폰 상에서 택배함을 작동시키는 메뉴 기반의 원격 제어 어플리케이션이고 비휘발성 메모리에 저장된 비밀번호를 이용하여 잠금 해제와 비밀번호 변경을 할 수 있다. 본 논문에서 제안된 개인 무인 택배함은 빈 보관함을 판단할 필요가 없고, 비밀번호 오류 누적 기능과 단문 메시지로 택배함 동작 결과를 자동 발송함으로써 보안강화 측면에서 기존 방식보다 더 좋은 장점 가진다.

• 융합정보논문지
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• 제8권6호
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• pp.193-199
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• 2018

본 온라인으로 구매한 물품을 택배 시스템으로 수령하는 경우에는 택배물품의 도난은 물론 강력 범죄로부터의 불안이 상존하고 있다. 기존에 설치되고 있는 Kiosk방식의 무인 택배함은 초기 설치의 과다투자와 운용상 관리 비용 그리고 일부 보안 측면에서 문제성을 내포하고 있다. 본 논문에서는 이러한 Kiosk방식의 전용장비를 대체하는 방안으로 개인이 소지한 스마트폰을 이용하고 최대 64개의 택배함을 동시에 제어하고 모니터링 할 수 있는 무인 스마트 택배함의 시스템 개발에 대하여 기술한다. 또한 무선통신에서 취약한 보안을 강화하기 위한 새로운 알고리즘을 제안한다. 아울러 설치자의 중앙 서버를 이용하여 택배물 관리 비용의 최소화하는 ICT 융복합 기술방안을 제시함으로써 비용절감 효과를 기대할 수 있다.

• 산업경영시스템학회지
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• 제45권4호
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• pp.134-141
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• 2022

Transportation in urban area has been getting hard to fulfill the demand on time. There are various uncertainties and obstacles related with road conditions, traffic congestions, and accidents to interrupt the on-time deliveries. With this situation, the last mile logistics has been a keen issue for researchers and practitioners to find the best strategy of the problem. A way to resolve the problem is to use parcel lockers. Parcel locker is a storage that customers can pick up their products. Transportation vehicles deliver the products to parcel lockers instead of all customer sites. Using the parcel lockers, the total delivery costs can be reduced. However, the inconvenience of customer has to increase. Thus, we have to optimal solution to balance between the total delivery costs and customers' inconvenience. This paper formulates a mathematical model to find the optimal solution for the vehicle routing problem and the location problem of parcel lockers. Experimental results provide the viability to find optimal strategy for the routing problem as well as the location problem.

• 시스템엔지니어링학술지
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• 제19권2호
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• pp.59-73
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• 2023

Due to the steady growth of the online shopping market and contact-free consumption, the volume of parcels in South Korea continues to increase. However, there is a lack of manpower for delivery workers to handle the growing parcel volume, leading to frequent accidents related to delivery work. As a result, the government and local authorities strive to enhance last-mile logistics efficiency. As one of these measures, unmanned parcel storage lockers are installed and utilized to handle last-mile deliveries. However, the existing parcel storage involves the inconvenience of couriers having to put each parcel in each locker, and this is somewhat insufficient to relieve the workload of delivery workers. In this study, we propose parcel storage devices that use active loading technology to minimize the workload of delivery workers, extract operation risk factors to apply this system to actual sites, and establish risk reduction methods based on the ALARP concept. Through this study, we have laid the groundwork for improving the safety of the system by identifying and proposing mitigation measures for the risk factors associated with the proposed parcel storage devices utilizing active loading technology. When applied in practical settings in the future, this foundation will contribute to the development of a more efficient and secure system. By applying the ALARP concept, a systems engineering technique used in this research, to the development and maintenance of storage devices leveraging active loading technology, it is thought to make the development process more systematic and structured. Furthermore, through the risk management of the proposed system, it is anticipated that a systematic approach to quality management can be employed to minimize defects and provide a stable system. This is expected to be more useful than the existing unmanned parcel storage devices.