우리나라 주요항만의 물류시스템 수준평가에 관한 연구

여기태 ( Gi Tae Yeo ) 한국물류학회 2008 물류학회지 Vol.18 No.2

퍼지이론을 도입한 동북아 항만물류 거점간 경쟁 및 협력현상의 구조분석에 관한 연구

여기태(Yeo, Gi-tae) 한국물류학회 2007 물류학회지 Vol.17 No.2

최근 동북아시아에서 일어나고 있는 폭발적인 물류증가세는 동 지역 내 항만물류 거점간 경쟁 및 협력현상을 유발하고 있다. 특히, 중국항만의 확장 및 신흥항만의 급성장에 대비하기 위하여 한국 및 일본의 항만은 다양한 전략마련에 부심 하고 있다. 이러한 측면에서 본 연구는 경쟁 및 협력현상을 중심으로 동북아시아 항만을 체계적으로 분류하기 위하여, FCM (Fuzzy C-Mean)법을 사용하여 분석을 수행하였다. 그 결과 대상지역 21개 주요 항만은 총 5개의 독자적인 위상을 갖는 항만군으로 분류됨을 확인하였다. 가장 경쟁에서 우위를 점하는 항만은 A 군집에 속하는 홍콩항만이 차지하였으며 이를 근접한 위치에서 추격하는 항만군은 부산, 상하이, 선전 항만이 속한 B 군집으로 확인되었다. 또한,A와 B군 집에 이어 경쟁력을 갖춘 것으로 판단되는 중간그룹은 칭다오, 닝보, 텐진항이 포함되는 C군집으로 나타났다. 한편, 기장 하위에 위치하는 D군집(요코하마, 다렌, 고베, 나고야)과 E군집(타이충, 인천, 푸저우)은 협력항 전략과 직기항유도 전략이 필요한 군집으로 분석되었다. 한편, 기존 연구결과에 비교를 통하여, 시계열변화에 따른 동북아시아지역 항만의 위상변화를 제시하였다. The aim of this research is to classify the 21 container ports in Northeast Asia regioin using components of competition and co-operation under the well-known methodology" FCM(Fuzzy C-Mean). Through this approach, those 21 ports were classified into five port groups, and also membership degree of each port within the five port groups were suggested. As results, Honk Kong which positioned Group A, was turned out the most competitive independent port. The next competitive group was found out as Group B which consisted of port of Busan, Shanghai and Shenzen. The Group C, which located in the middle level in terms of competitiveness and seemed to have potential to compete to Group A and B, included the three ports i.e., Qingdao, Ningbo and Tianjin. Finally, the lowest competitive port groups in the targeted area were shown as Group D (Yokohama, Dalian, Kobe, Nagoya, Osaka) and Group E (Taichung, Inchon, Fuzhou), which have five and three ports respectively, were needed to search the co-operation strategies.

환경변화를 고려한 우리나라 물류시스템 분석요소 평가

여기태(Gi-Tae Yeo) 한국항만경제학회 2009 韓國港灣經濟學會誌 Vol.25 No.2

본 연구는 AHP(Analytic Hierarchy Process)법을 이용하여 우리나라 물류시스템를 구성하는 분석요소인 ‘내부 구성요소’와 ‘외부 요구항목’을 추출하고, 이들 요소의 가중치 및 우선순위 제시하여 우리나라 물류시스템 효율화에 시급한 개선점 제시를 연구의 목적으로 하였다. 연구의 결과, ‘내부 구성요소’는 도로, 철도, 해운, 항공, 파이프라인의 총 5가지 요소로 구성됨을 확인하였다. AHP법을 이용한 분석결과, 설문에 응답한 전문가들은 도로(0.312)를 가장 중요한 내부 구성요소로 판단하고 있으며, 해운(0.269)을 2순위, 철도(0.239)을 3순위, 항공(0.118)을 4순위, 파이프라인(0.063)을 5순위로 중요하게 고려하고 있었다. 한편, 물류시스템 ‘외부 요구항목’은 기반시설, 운영효율성, 정보시스템, 인적자원, 비즈니스환경, 정치적환경, 연계성 등 총 7가지 요소로 구성됨을 확인하였다. ‘외부 요구항목에 대하여 AHP법을 적용한 결과 설문에 응답한 전문가들은 요구항목 중 기반시설(0.322)을 1순위, 운영효율성(0.206)을 2순위, 정보시스템(0.151)을 3순위, 인적자원(0.121)을 4순위, 비즈니스환경(0.075)을 5순위, 연계성(0.073)을 6순위, 정치적환경(0.052)을 가장 낮은 순위로 판단함을 알 수 있었다. The aim of this paper is to evaluate weight and priority values for 'inner consisted factors' and 'outer requested factors' of logistics system using the AHP(Analytic Hierarchicy Process) method. As for analysis regarding inner consisted factors, the results were shown as follows: a road transportation (0.312) as first rank; a marine transportation (0.269) as second rank; a railway transportation (0.239) as third rank; an air transportation (0.118) as fourth rank, and a pipeline transportation (0.063) as fifth rank. In terms of analysis regarding outer requested factors, the results were came out as follows: an infrastructure (0.322) as first rank; a performance (0.206) as second rank; an information system (0.151) as third rank; a human resources (0.121) as fourth rank, a business environment (0.075) as fifth rank; a connectivity (0.073) as sixth rank, and a political environment (0.052) as seventh rank.

Quadratic 복수 컨테이너 적재 문제에 관한 연구

여기태(Gi-Tae Yeo),석상문(Sang-Moon Soak),이상욱(Sang-Wook Lee) 한국경영과학회 2009 韓國經營科學會誌 Vol.34 No.3

The container packing problem is one of the traditional optimization problems, which is very related to the knapsack problem and the bin packing problem. In this paper, we deal with the quadratic multiple container packing problem (QMCPP) and it is known as a NP-hard problem. Thus, it seems to be natural to use a heuristic approach such as evolutionary algorithms for solving the QMCPP. Until now, only a few researchers have studied on this problem and some evolutionary algorithms have been proposed. This paper introduces a new efficient evolutionary algorithm for the QMCPP. The proposed algorithm is devised by improving the original network random key method, which is employed as an encoding method in evolutionary algorithms. And we also propose local search algorithms and incorporate them with the proposed evolutionary algorithm. Finally we compare the proposed algorithm with the previous algorithms and show the proposed algorithm finds the new best results in most of the benchmark instances.

국내 해상관광 항로활성화를 위한 효율성 분석에 관한 연구

여기태(Gi tae Yeo),조건식(Geon sik Jo),이진규(Jin kyu Lee),왕영(Ying Wang) 한국국제상학회 2014 國際商學 Vol.29 No.4

본 연구는 자료포락분석(DEA)방법 중 투입중심 CCR 모형과 BCC 모형 및 Malmquist 지수 모형을 활용하여 국내 12개 해상관광항로의 효율성을 분석하는 것을 목적으로 하였다. 국내 12개 해상관광항로는 2012년 관광객 수송실적 341,422명, 운항거리 33.55해상마일을 평균적으로 기록하였다. 효율성 분석을 위해 속력, 총톤수, 운항거리를 투입변수로, 여객수송 실적을 산출변수로 선정하였다. 분석 결과, 2007년~2012년까지 모슬포-마라도 항로가 CCR, BCC, 규모 효율성 모두 1로 나타났다. 동기간 정적 BCG 분석에서도 모슬포-마라도항로는 "Star"군에 위치하고 있는 것으로 나타났다. 향후 관광항로의 활성화를 위해서는 공적지원확장, 선박금융제도 지원 등 정부의 적극적인 지원정책과 이용자의 요구가 반영된 관광 상품 개발 등을 통한 운영 효율성 향상이 필요하다. Purpose : This paper aims to analyze the relative efficiency within the Korean Tourism Sea Routes(KTSRs), to select the relatively low effective Decision Making Units(DMUs), and to suggest the activation strategies for those. Research design, data, methodology : As a research methodology, input oriented CCR and BCC models of Data Envelopment Analysis(DEA) and Malmquist Index Model were applied to 12 KTSRs. To draw out the efficiency of targeted KTSRs, 'ships' speed', 'total tonnage' and 'operation distance' are used as input variables while the 'total number of tourists' is represented as output variables. Results : As a result, Moseolpo-Marado is the most efficient sea route which is scored CCR and BCC 1. Conclusions : For an activation of tourism routes in the near future, government's policies such as public supports, and ship's financial assistance are urgently needed. In addition, the enhancement of operational efficiency is required through the development of tourism contents based on customers' needs.

패널회귀분석을 이용한 연안여객선 취항계획 특성분석에 관한 연구

여기태 ( Yeo Gi-tae ),박성훈 ( Park Sung-hoon ),오재균 ( Oh Jae-gyun ),양태현 ( Yang Tae-hyun ),남태현 ( Nam Tae-hyun ) 한국해운물류학회(구 한국해운학회) 2019 해운물류연구 Vol.35 No.1

본 연구는 패널회귀분석을 활용하여 연안여객선 취항계획 특성분석을 수행하는 것을 목적으로 한다. 분석결과 GLS와 고정효과 분석결과 결항일수와 여객수송실적은 취항계획에 정의 영향을 끼치며 화물수송실적과 운임수입은 모형별로 상이한 것으로 나타났다. 또한 LSDV 및 OLS분석을 통해 지방청별로 군집을 이루는 경향을 확인하였다. 이는 지방청마다 여객선업체 및 선박의 잦은 변동이 존재하며 무조건적인 선박의 증편보다는 다양한 측면에서 심도있는 계획이 필요함을 나타낸다. 후속 연구에서는 항로별, 선종별로 나누고 세부적인 요인을 추가적으로 분석하여 보다 세밀하고 실무적인 결과를 도출해야할 필요성이 있다. The aim of this study is to analyse a characteristic analysis of coastal passenger vessels’ voyage scheduling using the Panel Regression Analysis. The GLS and Fixed Effect Analysis show that the number of canceled flights and passenger transport performance have a positive impact on the voyage scheduling, and that the freight transport performance and freight income vary from model to model. Also, through the LSDV and OLS analysis, the trend of cluster formation by regional office was confirmed. This indicates that there are frequent changes in passenger ship companies and ships, and in-depth plans are needed in various respects rather than the expansion of unconditional ships. Subsequent studies need to generate more detailed and practical results by further analysis of detailed factors, dividing them by route and vessel type.

인천항만의 물류수준 평가 및 개선방안 도출에 관한 연구

여기태(Yeo, Gi Tae) 인하대학교 정석물류통상연구원 2008 인하대학교 정석물류통상연구원 연구총서 Vol.- No.-

The aim of this paper is to establish the evaluation system of improving port logistics using the QFD(Quality Function Deployment) model which can facilitate to grasp the improving degree of realizing the system conforming to the relationship of all process and the process improvement. The research methodology is consisted of four phases. The first step is to investigate the important factors consisting the port logistics of Incheon and then calculate the weighting of factors by Analytic Hierarchy Process (AHP). The second step is to draw out the degree of inter-relation among factors by Fuzzy Subordination Relations (FSR). At the third step, the established system through the QFD method using results of the first and second steps will be used to evaluate and diagnosis the level of port logistics in Incheon. Finally, the sensitivity analysis is to be performed and the degree of improving port logistics will be presented according to the rising degree of the relevant factors. As a result, overall system level of Port of Incheon will be 54.33% for year 2007, 68.99% for year 2015, and 77.35% for year 2020. The critical factors increasing the system level largely from requested factors are port service, logistics cost and convenience while port logistics information system, storage and cargo handling system, and hinterland connecting system from consisted factors.

부산항의 재개발 대상지 선정 및 재개발 방향설정에 관한 연구

여기태 ( Yeo Gi Tae ) 한국경제지리학회 2003 한국경제지리학회지 Vol.6 No.2

Busan Port, Korea, is a region that must take integrated measures against problems such as the excessive handling of cargo volume, the intensification of port congestion, and the construction of a new port to improve port competitive power. In particular, if a great deal of function in the existing area of Busan Port transfers to a new port, then the problems of port redevelopment will occur as shown in the cases of port developed countries explained hereafter. For Korean ports, port redevelopment in a port zone is implemented for improving the port productivity that targets a local area, but the entire and systematic port redevelopment is not accounted for. Focused on this point, the paper is to present the directions for full-scale port redevelopment of the existing zone of Busan Port. The findings are as follows: First, the region of Busan is divided according to a regional classification that is necessary for port redevelopment. Thereby, 4 zones, total 26 regions of redevelopment were selected. Second, overseas case studies were considered for port redevelopment. From these same studies, appropriate types of port development in Korea were extracted and presented. Third, the status and problems of the selected redevelopment regions were analyzed, and types of port redevelopment were assigned. This study was not applied to the strict evaluation technique by quantitative analysis, but the concept and directions for unprecedented port redevelopment were first defined and established. It is significant to select target areas for redevelopment by regional classification and present directions for developing each region by choosing Busan Port as a real case study. This initiation will greatly contribute to the succeeding study.

전라북도 지역발전을 위한 물류진단시스템구축 및 개선방안 제시에 관한 연구

여기태(Gi-Tae Yeo),박준배(June-Bae Park) 한국항만경제학회 2006 韓國港灣經濟學會誌 Vol.22 No.1

The aim of this paper is to establish the evaluation system of improving urban logistics using the QFD(Quality Function Deployment) model which can facilitate to grasp the improving degree of realizing the system conforming to the relationship of all process and the process improvement. At the first stage, the established system through the QFD method will be used to evaluate and diagnosis the level of urban logistics in Cheonbuk District. The second stage is to investigate the important components that can make prompt improvement of urban logistics. Then, the sensitivity analysis is to be performed and the degree of improving urban logistics will be presented according to the rising degree of the relevant components.

유럽지역 컨테이너항만의 체계적 분류에 관한 연구

여기태(Gi Tae Yeo) 한국지역지리학회 2006 한국지역지리학회지 Vol.12 No.3