• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.39 no.3
• /
• pp.30-38
• /
• 2016

Shuttle-Based Storage/Retrieval System (SBS/RS) is relatively new to industry. The system is in the category of Automated Storage/Retrieval System (AS/RS), but it is different in that the SBS/RS uses shuttles as Storage/Retrieval (SR) machine instead using a stacker crane. The shuttles are assigned to each tier on multi-tier system and operated for pick-up or drop-off order. Since the system can handle multiple orders simultaneously, it can provide much higher throughput than that of general AS/RS with single stocker crane. Thus, this new system is well fit to recent tendency of increasing small quantity batch production and orders. One of the drawback of this system is that it needs a lot of investment to set up. The efficient operation of the system would be one of the critical matters to increase economic efficiency of capital investment. In this study, we focused on the dwell point policy for shuttles to find efficient way of operating the system. There are four basic policies for the dwell point and we had simulation-based experiment for two different scenarios based on the speed of the shuttle and inter-arrival time of the loads coming to the system combined with four different policies. As it was mentioned above, this SBS/RS relatively new to the field and there is no such experiment shown on previous research and the study of dwell point policy for this SBS/RS could provide the direct comparison of each policy with different hardware specification; the capability of the system. The policy that achieves most efficient operation among the given environment is proposed and the usability of the system is discussed.

• Journal of Korea Port Economic Association
• /
• v.33 no.3
• /
• pp.139-154
• /
• 2017

As competition in domestic and overseas ports intensify, new and small domestic ports are realizing certain limitations to independently secure competitiveness. This study collected data over 60 months with five modifications for container and general cargo volume around Gyeongin Port. Short-period (12 months) cargo volume was forecasted, which revealed the need for a middle-to-long-term development plan. First, the hinterland logistics complex of Gyeongin Port is expected to contribute to the coastal maritime facility through the quasi-public system for fishery product transportation and passenger services. It proposes to achieve this by opening channels to and from China for precision machinery, home network systems, LEDs, and machine industry items. second, specializing the ultra-light cargo transport route, and connecting the coastal island areas of the 5 West Sea Islands to Ara Waterway (Integrated Fishery Product Center of the 5 West Sea Islands). Third, on the basis of organic cooperation of government? local government ? port, the incentive and pre-circular support system would be required, and lastly, it shall carry out the adjustment of functions in nearby ports and specialization strategy simultaneously through the integrated operation of the ports in the capital areas.

• Journal of the Korean Institute of Intelligent Systems
• /
• v.23 no.3
• /
• pp.202-207
• /
• 2013

In the paper, we design a autonomous mobile robot for freight transportation and propose an operation method of the robot in the warehouse. In order to implement autonomous navigation, it is needed to recognize the position of the robot and track the path to the target. Previous methods are hard to change the workspace environment and need high cost to install and keep a maintenance of the system. The lifter of freight transportation robot is designed to load and unload a baggage through up and down motion. Also, ultrasonic sensor, RFID, QR-code and camera sensor is used to carry out various functions while the robot navigates in the various environment. We design an operation method of the mobile robot in order to effectively arrive a goal position and transport a freight. The proposed methods are verified through various experiments.

• Journal of Digital Convergence
• /
• v.18 no.11
• /
• pp.159-167
• /
• 2020

The purpose of this study was to present an alternative to improve the complex structure of Gyeonggi port governance. Based on previous research, advanced port operation, timely development of port, port safety management, and growth with the region were selected as the main roles of port governance. In addition, the importance of each role was analyzed by selecting the government-led port authority and government and local joint port authority as alternatives. As a result of the analysis, it was found that the establishment of the government-led port authority was reasonable in terms of advanced port operation, timely port development, and port safety management. On the other hand, local joint port authority is reasonable in terms of growth with the region. The implication of this study is that it is necessary to simplify port governance in Gyeonggi Privince and establish the government-led port authority in which Participation of local governments is required for linking regional administration and urban development plans.

• Journal of Digital Convergence
• /
• v.15 no.8
• /
• pp.45-58
• /
• 2017

The international freight forwarders in South Korea currently have fierce competition. However, there are still a very small number of studies Korea locally and globally on the service quality of international freight forwarding industry. This study aims to extract international freight forwarders' service quality factors reflecting the characteristics of freight forwarding industry. Measures of service quality have been selected after literature review and interviews, and then surveys have been conducted on exporters and importers in Korea. The collected data has been analyzed using the exploratory factor analysis. As a result, two service quality factors of international freight forwarders have been extracted: operation characteristics factor defined as accuracy, speediness timeliness and stability, and customer orientation factor defined as professionalism and empathy. An important contribution of this study is that it presents the service quality factors reflecting the characteristics of freight forwarding industry unlike precedent studies. A future research topic is to find out which of the two service quality factors influences more on customer loyalty.

• The Journal of shipping and logistics
• /
• v.34 no.4
• /
• pp.657-675
• /
• 2018

This study examines various policy programs for the creation of green harbors in major ports in the Northwest of the United States and suggests ways to apply them to major ports in Korea. Based on the fuzzy analysis process, the importance of major policy programs for the development of green ports in Korea was compared and analyzed. As a result of importance analysis, the Green Ship Incentive Program and the Carbon Footprint Program were identified as the most important policies. The first policy programs that should be introduced to Incheon Port are the AMP installation operation program and a vessel slowing program around the seaport. In case of Busan Port, the AMP installation operation program, the vessel slowing program around the seaport, carbon footprint, and installation of DPF were found to be excellent policies. These results may provide practical implications for policy makers of port authorities which has conducted environmental projects.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.20 no.4
• /
• pp.9-14
• /
• 2019

Recently, container vessels are required to be applied various technologies to improve ship life-cycle and operating efficiency for the cost decreasing of logistics. The degradation of engine efficiency due to the increasing capacity of the ship and the related equipment of facilities are applied to large-scale ships without considering the condition of ship operation by increasing the ship size and feature. In this paper, the flow analysis is performed with existing gas pipe in large-scale container ship with the operation-condition of higher capacity engine and facilities, and the results were used on the new gas pipe design for ULCS (Ultra Large Container Ship). The newly designed gas pipe can be expected to increase the operating efficiency of ULCS.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2023.05a
• /
• pp.61-62
• /
• 2023

There have been cases where the number of port workers has temporarily decreased due to COVID-19. To prevent the spread of COVID-19, a number of workers were quarantined, resulting in bottlenecks and waiting throughout the port operation process, increasing the congestion of terminals. As a result, problems such as a decrease in terminal operation efficiency occurred. However, it is understood that congestion centered on unloading equipment inside the terminal is not clearly calculated. Terminal congestion is thought to be a key factor directly related to the operational efficiency of the terminal. The congestion calculation method generally used in various fields measures congestion based on image-based data. Due to the nature of the loading and unloading equipment that moves according to the quantitative loading plan, it is unreasonable to apply the existing congestion calculation method. Therefore, this study presented a method of calculating terminal congestion using equipment waiting time and turnaround time, and verified the statistical significance of the congestion calculated using data from Terminal A of Busan Port.

• Korea Trade Review
• /
• v.45 no.5
• /
• pp.141-159
• /
• 2020

Container terminals at Gwangyang Port are operated by three container operators: A, B and C. Ultimately, there is consensus that a single operator should operate all terminals so that economies of scale can be achieved even in the operation of the container terminal. Integration between operators has a positive effect on both operators and shipping companies. From the operator's point of view, overlapping fixed costs between operators can be unified, reducing overall costs and utilizing spare facilities. On the other hand, from the viewpoint of the shipping company, it is possible to ensure stable use of the port facilities and always allow berthing, reduce days on demurrage and ship waiting, and provide one-stop service for work. However, existing cases of operators' integration or relocation of terminals remained to estimate the expected effects of alternatives, emphasizing only the financial point of view. The port terminal is a large system, and it is important to consider that it is an aggregate of major logistics facilities and equipment. Moreover, if the estimation can be made by quantifying the expected effect, the justification of the terminals' relocation can be further emphasized. Therefore, it is very important to estimate the expected effect from the viewpoint of systemic operation. Moreover, the need for operators' integration can be further emphasized if it can be estimated through quantification of expected effects. Currently, three alternatives are considered as alternatives to the terminals' relocation, and in this study, the optimal plan was derived for the 3 alternatives by the linear planning model of the minimum shuttle transportation cost in the terminal. The optimal plan is alternative 2, which shows the most advantageous integration effect in terms of expected effects. Alternative 2 integrates the B terminal into the C terminal, and the A terminal operates independently as it is.

• Journal of Navigation and Port Research
• /
• v.48 no.4
• /
• pp.284-293
• /
• 2024

As the importance of container ships in maritime transport grows, the demand and supply for such vessels have been increasing. To reduce costs and improve operational efficiency, container shipping lines have formed shipping alliances, engaging in joint operations and vessel-sharing arrangements. Since the establishment of these alliances in 1995, they have evolved in various forms. In 2024, Maersk and Hapag-Lloyd announced the formation of a new shipping alliance, the 'Gemini Cooperation,' set to begin in February 2025, signaling a potential realignment of shipping alliances. This shift will significantly impact operations of ports like Busan. In the case of Busan Port, the inability of a single terminal to accommodate large shipping alliance vessels has led to an increased reliance on multiple terminals, which in turn has caused an increase of inter-terminal transportation cost and a decrease in operational ef iciency. Therefore, this paper aimed to examine changes in shipping alliances since 2012, analyze the current usage of container terminals at Busan Port, and propose strategies for efficient port operations in response to expected realignment of shipping alliances.