• 한국항만경제학회지
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• 제19권2호
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• pp.33-53
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• 2003

The purpose of this paper is to investigate the effectiveness of port investemnt which is one of the important elements for measuring the port efficiency by using congestion approach of DEA(Data Envelopment Analysis). Congestion is said to be present when increases in inputs result in input reductions. Congestion approach takes the forms of weak input disposability and strong input disposability. Empirical analysis by using congestion approach in this paper identified inefficiencies in the inputs including port investment, and indicated inefficient ports like the ports of Sokcho, Gunsan, Pohang, and Seoguipo which shows the large amount of slacks with congestion especially in terms of port investment. Therefore these ports should examine the reason about the inefficiency of port investment. The main policy implication based on the findings of this study is that The Ministry of Maritime Affairs & fisheries in Korea should introduce congestion approach when the amount of port investment to each port is decided.

• 한국항만경제학회:학술대회논문집
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• 한국항만경제학회 2003년도 정기학술대회지
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• pp.221-242
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• 2003

The purpose of this paper is to investigate the effectiveness of port investment which is one of the important elements for measuring the port efficiency by using congestion approach of DEA(Data Envelopment Analysis). Congestion is said to be present when increases in inputs result in ouput reductions. Congestion approach takes the forms of weak input disposability and strong input disposability. Empirical analysis by using congestion approach in this paper identified inefficiencies in the inputs including port investment, and indicated inefficient ports like the ports of Sokcho, Gunsan, Pohang, and Seoguipo which shows the large amount of slacks with congestion especially in terms of port investment. Therefore these ports should examine the reason about the inefficiency of port investment. The main policy implication based on the findings of this study is that The Ministry of Maritime Affairs & Fisheries in Korea should introduce congestion approach when the amount of port investment to each port is decided.

• 한국항만학회지
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• 제11권2호
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• pp.173-189
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• 1997

Whether over taking or parallel sailing of two or more vessels is allowable on marine traffic route or not, the traffic congestion due to traffic volume has to be evaluated separately. In Gaduk-sudo, overtaking or parallel sailing is so allowable that the Bumper Model is introduced to evaluated the traffic congestion. But the channels within the habour limit such as the route of Ulsan New Port are so prohibited overtaking or parallel sailing that the traffic congestion has to be evaluated by using theoretical traffic capacity or by traffic simulation. In this paper, the congestion of Southern New Port and Mipo Port was evaluated the congestion by using theoretical traffic capacity and the other area of Ulsan Port by traffic simulation. The incresed traffic volumes on Ulsan Channels according to Ulsan New Port Development in 2011 were evaluated to have no effect with the traffic congestion.

• 한국항만경제학회지
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• 제33권4호
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• pp.135-148
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• 2017

본 연구는 다음과 같은 문제를 제기한다. 체선이 항만의 운영 효율성에 어느 정도 영향을 미치는가? 이 연구 문제에 대한 답하기 위해 본 연구에서는 SBM-DEA 모형을 이용하여 체선을 고려한 항만의 효율성을 분석하고 DEA-CCR BCC 모형의 연구 결과와 비교하였다. 먼저 DEA-CCR BCC 분석 결과, 부산(2011), 울산(2011)이 효율적인 DMU로 나타났으며 DEA-BCC 모형 분석 결과, 부산(2011), 울산(2011), 울산(2012), 부산(2012), 여수 광양(2012)이 효율적인 DMU로 나타났다. 체선을 고려한 SBM-DEA 모형 분석 결과, 울산(2012), 부산(2011), 부산(2012), 인천(2011), 울산(2011)이 효율적인 DMU로 나타났다. DEA-CCR BCC 결과와 SBM-DEA 결과 간 불일치를 보여 체선이 항만의 운영 효율성에 미치는 영향이 크지 않은 것으로 나타났으며 체선선박척수의 잔여물을 제거한다면 인천항은 3년간 총 11.9억 원, 여수 광양항은 3년 간 총 65.52억 원의 비용 보존이 가능한 것으로 나타났다.

• 해양환경안전학회지
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• 제19권5호
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• pp.483-490
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• 2013

본 연구는 우리나라 전국 무역항 중 입항 선박이 많은 주요 4개 항만을 선정하여 10일간의 AIS 실측 자료를 분석하였다. 실측 조사로 산출한 주요항만의 피크시간 혼잡도는 시간당 평균혼잡도 보다 약 3.8~5.7배 높게 나타났다. 이는 기존의 Port-MIS 통계자료로 울산항 본항의 해상교통혼잡도를 평가한 선행연구 사례에서 피크시간 혼잡도가 시간당 평균혼잡도 보다 약 1.7배 높은 것과는 많은 차이가 있어 현 항로의 교통특성을 왜곡하는 문제를 확인할 수 있다. 따라서 해상교통혼잡도를 평가할 때에는 Port-MIS 통계자료보다 실측조사를 기반으로 해상교통혼잡도를 산출하는 것이 타당하다고 본다.

• 한국항만학회지
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• 제11권1호
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• pp.45-64
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• 1997

Ship's delay caused by port congestion has drawn attention to the necessity for analysis on overall operation in port. But, in order to analyze the complicated port operation which contains large number of variable factors, queueing theory is needed to be adopted, which is applicable to a large scale transportation including ship's arrival in a large port. In this paper, a simulation model for Inchon Port was developed by the software SIMAN V and presented congestion rate under a certain scenario regarding the arrival ship's number and service levels. To develop the simulation model, types of ships and cargoes during the 1995 in Inchon Port was analyzed in advance. The results of the simulation can be summarized as follows : In order to maintain present levels of congestion rate and time with the increasing number of arrival vessels, service rate should be increased at an exponential rate. To improve the current congestion effectively, part of cargoes are needed to be transferred to a newly developing port. Results obtained from simulation can be used properly to prepare improved service levels and to plan appropriate investment strategies.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2023년도 춘계학술대회
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• pp.61-62
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• 2023

지난 COVID-19로 인해 항만 노동자 수가 일시적으로 감소하는 경우가 발생하였다. 감염병 확산 방지를 위해 다수의 노동자가 격리됨에 따라 항만 운영 프로세스 곳곳에서 병목과 대기가 발생하여 터미널의 혼잡도가 증가하였고, 이로 인해 터미널 운영 효율성이 저하되는 등의 문제가 발생하였다. 그러나 터미널 혼잡도는 터미널의 운영 효율성과 직결되는 핵심 지표임에도 터미널 내부 하역장비 중심의 혼잡도는 명확한 계산이 이루어지지 않는것으로 파악된다. 따라서 본 연구를 통해 하역장비 중심의 컨테이너터미널 혼잡도를 측정하고자 한다. 여러 분야에서 일반적으로 사용되는 혼잡도 산정방식은 이미지 기반의 데이터를 바탕으로 혼잡도를 측정하고 있다. 이러한 방식은 양적하 계획에 따라 움직이는 하역장비의 특성상 기존의 혼잡도 산정방식을 그대로 적용하는것은 다소 무리가 있다. 따라서 본 연구에서는 장비의 대기시간 및 turn around time 등을 활용한 터미널 혼잡도의 산정방식을 제시하고, 부산항 A 터미널의 데이터를 활용하여 산정된 혼잡도의 유의성을 검증하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1998년도 추계학술대회논문집:21세기에 대비한 지능형 통합항만관리
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• pp.323-329
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• 1998

In Pusan port, the studies, which analysis container cargo volumes by using forecasting methods and research about container logistics system, etc., have been continuously performed. But, in Pusan port, this study on an evaluation of traffic congestion has been scarcely performed until now. Especially, when changing and extending a berth, and constructing a new port, it is very important to examine this field. And it should be considered. Thus, this paper aims to analysis the effect of ship traffic condition in 2011, to evaluate marine traffic congestion, according to changing ship traffic volumes in Pusan port. To analysis it, we used simulation method and examined the results

• 한국항만학회지
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• 제12권2호
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• pp.177-194
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• 1998

In Pusan port, the studies which analyze container cargo volumes by using forecasting methods and research about container logistics system, etc., have been continuously carried out. But, in Pusan port, the study on an evaluation of traffic congestion has been scarcely performed until now. Especially, when changing and extending a berth, or constructing a new port, it is very important to examine this field. And it should be considered. Thus, this paper aims to analyze the effect of ship traffic condition in the year 2011, to evaluate marine traffic congestion according to changing ship traffic volumes in Pusan port. To analyze it, we examined the results by simulation method.

• 한국항만학회지
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• 제14권1호
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• pp.27-35
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• 2000

In Pusan Harbour, new port development projects are implemented such as the Extended Terminal adjacent to the Gamman Terminal, Pusan New Port, the Navy $\bigcirc$$\bigcirc$ piers, etc. which will require new marine traffic environments in the Passage I of Pusan Harbour. Specially, the turning basin of the Extended Terminal adjacent to the Gamman Terminal has been designed to overlay the Passage I of Pusan Harbour, which will interrupt the inbound traffic flow and the results will be worried to decrease the efficiency of port operation. Therefore, this paper will be aimed to evaluate the traffic congestion in the Pusan Passage I due to the opening of new ports within Pusan Harbour in 2006 and 2011 by using computer simulation based the queueing theory.