• 대한안전경영과학회지
• /
• 제16권3호
• /
• pp.363-368
• /
• 2014

During the fierce competition among the companies, improvement of logistics center managing efficiency is importantly recognized. Among them, studies on improvement of picking work process on about 55% of logistics center managing costs are continuously conducted. And, most of studies focus on analysis on strengths and weaknesses of picking method performable on the stage of logistics center design, etc, so the purposes of this research are to define load location rule by product releasing frequency in logistics managing environment based on conveyer and suggest expected effects by simulation analyzing method to improve picking managing efficiency.

• 로봇학회논문지
• /
• 제17권4호
• /
• pp.407-416
• /
• 2022

Multiple AMRs have been proved to be effective in improving warehouse productivity by eliminating workers' wasteful walking time. Although Multi-agent Path Finding (MAPF)-based solution is an optimal approach for this task, its deployment in practice is challenging mainly due to its imperfect plan-execution capabilities and insufficient computing resources for high-density environments. In this paper, we present a MAPF-based fleet management system architecture that robustly manages multiple robots by re-computing their paths whenever it is necessary. To achieve this, we defined four events that trigger our MAPF solver framework to generate new paths. These paths are then delivered to each AMR through ROS2 message topic. We also optimized a graph structure that effectively captures spatial information of the warehouse. By using this graph structure we can reduce computational burden while keeping its rescheduling functionality. With proposed MAPF-based fleet management system, we can control AMRs without collision or deadlock. We applied our fleet management system to the real logistics warehouse with 10 AMRs and observed that it works without a problem. We also present the usage statistic of adopting AMRs with proposed fleet management system to the warehouse. We show that it is useful over 25% of daily working time.

• 대한안전경영과학회지
• /
• 제11권4호
• /
• pp.193-199
• /
• 2009

Recently, an industrial production-distribution planning problem has been widely investigated in Supply Chain Management(SCM). One of the key issues in the current SCM research area is reverse logistics network. This study have developed a simulation model for the reverse logistics network. The simulation model analysis reverse logistics network issues such as inventory policy, manufacturing policy, transportation mode, warehouse assignment, supplier assignment. Computational experiments using commercial simulation tool ARENA show that the real problems. The model can be used to decide an appropriate production-distribution planning problem in the research area.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2004년도 춘계학술대회
• /
• pp.303-307
• /
• 2004

Is not used by consistency transport at transport of freight nothing but is using Pallet only by pedestal when work palletized unit load or materials handling when keep simplicity receptacle which fill raw material or product in factory in our country. Therefore, pallet that is most important function of Pallet is not empled circulation to end consumer from manufacturing plant which is circulation process whole path being done and factory. It is real condition stopping only in extremely determinate part process use of warehouse back. Additionally, it is possible to figure out the flow of all the materials loaded on the RFID pallet; product, material, raw material immediately, so that epoch-making management is possible and it contributes to the reduction of logistics cost because there are little loss or outflow of pallet. The materials flow is getting speedy and inventory is decreasing in the logistics process, and also bad inventory and loss problems are prevented. As a result, not only logistics cost of company but also national logistics cost is decreased. Thus it contributes to the strength of national competitiveness.

• 한국컴퓨터정보학회논문지
• /
• 제28권10호
• /
• pp.171-178
• /
• 2023

본 논문은 공간 활용 극대화를 위한 스마트 자동 적재창고를 제안한다. 기존 수직형 적재창고의 트레이 최대 강성 하중이 100kg로 설계되어 공간내에 적재할 수 있는 팔레트가 극히 제한적이라는 문제점을 가진다. 본 논문에서는 최대 수직강성을 300kg으로 설계하여 공간 활용도를 극대화할 수 있는 스마트 적재창고를 설계하고 구현된 결과를 보인다. 구현된 적재창고의 성능평가 결과를 살펴보면, 최대 적재하중은 500.6kg으로 당초 설계 및 요구도를 달성하였으며, 수직강하속도는 0.5m/s, 장치의 작동 소음은 67.1dB, 팔레트의 입출고 시간은 36.92초, 트레이 처짐량은 4mm로 모든 평가항목에서 우수한 성능을 보였다. 또한, 제어부와 조작 패널의 UI를 별도로 설계하는 PLC 방식의 제어방식을 PC 시스템으로 통합하여 다양한 공정관리 시스템과의 연동성과 유지보수성을 증대하였다. 향후 IoT 센서기반의 물류 로봇을 연동하여 완전 자동화된 스마트 적재창고로 발전시키고자 한다.

• 한국건설순환자원학회지
• /
• 제9권4호
• /
• pp.33-41
• /
• 2014

• 한국항만경제학회지
• /
• 제39권3호
• /
• pp.1-19
• /
• 2023

해상 수입화물은 입항 및 하역에서 보세구역으로 입고되기까지 컨테이너 터미널 정보조회서비스나 관세청 유니패스(UNI-PASS) 등을 통해 확인할 수 있다. 하지만 보세구역·보세물류창고에 장치된 이후, 화물의 출고가 이루어지기까지 과정에 대한 정보의 공유 및 경과 확인수준은 부족한 실정이며, 이로 인해 화물의 무단·불법 인도와 관련한 분쟁, 법적 다툼 등의 문제가 발생하고 있다. 본 연구는 기존 수입화물의 인도에서 제기되던 인도관행 문제, 수입관련 주체 간의 무단 불법 인도에 대한 법적 책임과 관련한 법적분쟁 등의 문제점을 해결할 수 방안으로 표준전자문서 도입을 제시하고자 하였다. 부산항신항 배후단지 보세창고·물류센터를 관리하는 서비스 제공자와 이를 이용하는 화주인 서비스 이용자로 집단을 분류하여 설문을 진행하고 두 집단 간 인식차이를 분석하였다. 분석결과 두 집단 모두 표준전자문서 도입이 필요하다고 판단하고 있으며, 오 출고 예방 및 감소, 무단·불법출고 문제의 예방 및 개선에서 높은 기대효과를 보이는 것으로 나타났다. 이는 입출고관리시스템의 표준전자문서 도입을 위한 관련 기관, 관련 당사자·주체 간의 논의가 우선적으로 필요하다고 판단되며, 표준전자문서시스템에 대한 관심과 서비스 제공자 및 서비스 이용자 등 관련 주체의 실제적인 참여가 제도의 구축 및 향후 성공적, 안정적 이용, 이용의 확대에 매우 중요한 역할을 할 것으로 판단된다.

• 대한안전경영과학회지
• /
• 제19권3호
• /
• pp.109-115
• /
• 2017

In order to increase the productivity of the logistics center and transportation, we try to articulate the priority ranking factors of the productivity influenced by the personality of the field workers (logistics center workers) and functional workers (drivers) via the AHP technique Individual personality was studied by applying the Big 5 model of psychological factors (openness, Conscientiousness, extroversion, Agreeableness, neuroticism). In this paper, extraversion was critically analyzed as a priority factor. A trait of extroversion is a strongly active and individual personality. In this study, the field workers are logistics center workers and the functional workers are drivers. They are interactively influenced in the In & Out operation. For example, when it comes to 'up and down work' and 'inspection work', the functional workers perform 'up and down work' and 'delivery work' and the field workers perform 'inspection work'. Stressing on the respective work has an affect on work productivity. Inspection workforce has something to do with inventory management. Functional workforce affects the delivery workforce. Delivery work is positively correlated with customer satisfaction. Nevertheless, as a result of research, extrovert personality that has something to do with an energetic activity would not affect on the implementation of their operation. In addition, personal extraversion of workers and drivers in the warehouse can have a significant impact on job commitment and productivity improvement.

• 대한건축학회논문집:계획계
• /
• 제36권1호
• /
• pp.37-48
• /
• 2020

Logistics centers, distribution centers, or warehouse facilities increasingly dominate urban and suburban landscapes, their enormous but blank, repetitive facades completely overshadowing adjacent buildings. Mostly ignored by architects, this new building type symbolically represents the arrival of post-anthropocene, or post-urbicene era of architecture, in which an increasing portion of our built environment will not be intended for human occupancy, but rather for use by machines and artificial intelligence. As a new wave of logistics centers are becoming more automated, and more supersized, it is important to deepen architects' understanding of the organizational logic and programming factors that inform the overall design decisions for these facilities. With a particular focus on three case studies--Coupang, E-Mart, and Amazon Fulfillment Centers, this research examines the current trends in automation and expansion of logistics centers, and offers an analysis and forecast for future facilities in South Korea.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제16권5호
• /
• pp.1708-1734
• /
• 2022

In the development of logistics system, the breakthrough of important technologies such as technology platform for logistics information management and control is the key content of the study. Based on Javascript and JQuery, the logistics system realizes real-time monitoring, collection of historical status data, statistical analysis and display, intelligent recommendation and other functions. In order to strengthen the cooperation of warehouse storage, enhance the utilization rate of resources, and achieve the purpose of real-time and visual supervision of transportation equipment and cargo tracking, this paper studies the VNF dynamic deployment and SFC routing problem in the network load change scenario based on the logistics system. The BIP model is used to model the VNF dynamic deployment and routing problem. The optimization objective is to minimize the total cost overhead generated by each SFCR. Furthermore, the application of the SFC mapping algorithm in the routing topology solving problem is proposed. Based on the concept of relative cost and the idea of topology transformation, the SFC-map algorithm can efficiently complete the dynamic deployment of VNF and the routing calculation of SFC by using multi-layer graph. In the simulation platform based on the logistics system, the proposed algorithm is compared with VNF-DRA algorithm and Provision Traffic algorithm in the network receiving rate, throughput, path end-to-end delay, deployment number, running time and utilization rate. According to the test results, it is verified that the test results of the optimization algorithm in this paper are obviously improved compared with the comparison method, and it has higher practical application and promotion value.