• 유통과학연구
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• 제14권3호
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• pp.73-83
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• 2016

Purpose - The parcel delivery service(courier) industry all over the world has been expanding its market so far, but its growth has been declining in recent years. In this situation, most parcel delivery companies are having trouble with managing themselves because of the pressure from the customer to increase service level and decrease the rate. The purpose of this study is to provide ways to improve competitive advantages of the parcel delivery service industry by evaluating the multi-period operating efficiency of Korea, Japan and global service providers. Research design, data, and methodology - The data for the period of 2011 to 2014 were collected from the annual reports published by parcel delivery companies. In this study, we analyze the marketability (revenue), profitability (operating profits), and management conditions (net profits) of parcel service companies by combining information on human resources (number of employees) and material resources (total assets and equity). Therefore, the number of employees, total assets, and equity are selected as input variables, and revenue, operating profits, and net profits as the output variables. In this study, DEA (Data Envelopment Analysis) is used to measure the comparative efficiency and MPI (Malmquist Productivity Index) is used to analyze the trend of change of the efficiency for a multi-year period. Results - The operational efficiency scores of medium-sized parcel delivery companies in Korea are higher than other larger competitors such as Korean, Japan and Global larger companies. As of 2014, Logen(1.878) was found to be the most efficient parcel delivery enterprise, followed by KGB (1.224), and Kyoungdong(1.002). Otherwise, Hanjin(0.235), CJ(0.262), Hyundai Logistics(0.657), DHL(0.611), UPS(0.766), FedEx(0.498), TNT(0.350), Yamato(0.762) and Sagawa(0.520), larger sized companies, were done inefficiently. The productivity of parcel delivery companies is influenced by endogenous factors as well as exogenous ones such as changes in business environment and technological advances. Conclusions - Korean medium-sized companies have relatively high efficiency scores in operation. That is why they still survive the competitive market in Korea where market restructuring on the industry has been expected to be conducted for many years. The reason why medium-sized couriers had higher efficient scores than larger couriers is that most of couriers spend more operating expenses versus unit price of delivery which is the amount of money that is needed in order to send a package by parcel service. So the delivery unit price must be taken into account by all the expenses associated with the cost of fuel, labor and maintenance expenses for facilities, etc. therefore, the unit price must be increased to strengthen business competitive power. In order for the industry to have more competitive advantage, the companies need to make profits by increasing demand volume and raising the delivery rate to provide high-quality delivery service to customers. And both endogenous and exogenous change must take precedence in order to strengthen their competitiveness.

• 대한전기학회논문지:전력기술부문A
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• 제51권5호
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• pp.217-224
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• 2002

This paper presents an algorithm to obtain an approximate optimal solution for the service restoration and load balancing of large scale radial distribution system in a real-time operation environment. Since the problem is formulated as a combinatorial optimization problem, it is difficult to solve a large-scale combinatorial optimization problem accurately within the reasonable computation time. Therefore, in order to find an approximate optimal solution quickly, the authors proposed an algorithm which combines optimization technique called cyclic best-first search with heuristic based feeder loadings balance index for computational efficiency and robust performance. To demonstrate the validity of the proposed algorithm, numerical calculations are carried out the KEPCO's 108 bus distribution system.

• 한국병원경영학회지
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• 제20권2호
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• pp.39-56
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• 2015

This study calculated the potential customer satisfaction improvement index (PCSI index) and average satisfaction coefficient (ASC) by categorizing quality attributes based on the Kano analysis for medical service quality. This study seeks to suggest ways to increase the efficiency of medical business management by determining priority to improve after applying the indexes to IPA. To achieve such purposes, this study conducted a survey on 150 outpatients of a premium general hospital and 200 workers in four different sections in the same hospital. As a result of the analysis, there was a difference in the awareness of service quality to improve patient satisfaction between the outpatients and workers. Therefore, the focus should be put on those items deemed important by the patients rather than those that the workers called attention to in order to effectively improve service quality. Along with efforts to alleviate or eliminate inconveniences experienced by patients, it is necessary to provide training programs for workers on customer reception and management such as delivering services with a kind manner and giving explanations in a proper and professional manner and exhibiting the right attitude.

• 보건행정학회지
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• 제20권4호
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• pp.45-57
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• 2010

Background : If different cost efficiency indexes were informed to the same clinic depending on the inclusion or exclusion of pharmacy cost, it may impair the reliability of provider-profiling system. This study aimed to investigate whether the omission of pharmacy cost affects cost-efficiency rankings in medical clinics. Methods : Data for ambulatory care cost at 23,112 medical clinics were collected from the claims database, which was constructed after review by the Health Insurance Review and Assessment Service (HIRA) of Korea in April 2007. We calculated two types of cost efficiency indexes by inclusion or exclusion of pharmacy cost for a medical clinic. The agreement between the decile rankings of the two indexes was also assessed using the weighted kappa statistic of Landis and Koch. Results : When the cost efficiency index for total cost including pharmacy cost was compared with the index for total cost excluding it, the agreement between the two indexes was only 55%. The agreements between the two indexes were relatively low within specialties which have larger pharmacy volume of total cost and lower correlation between total cost with or without pharmacy cost included than the average level of all the specialties. Conclusion : These results suggest that the omission of pharmacy cost may result in contradictory outcomes that may be confusing to a medical institution and may impair the reliability of provider-profiling systems. It is very important to standardize profiling criteria for the reliability of provider profiling system.

• 보건행정학회지
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• 제25권2호
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• pp.118-128
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• 2015

Background: We measured productivity changes of regional public hospitals using both global Malmquist productivity index-based on global production possibility set over all the periods-and the traditional Malmquist productivity index and analyzed the factors of productivity change. Methods: The data used in this study is two annual inputs and two annual outputs of 32 regional public hospitals in Korea from 2005 to 2009 and the results such as distances and Malmquist productivity index and global Malmquist productivity index are obtained by an R program written for this study. Results: The results can be summarized as follows. Firstly, technical efficiencies of regional public hospitals are affected largely by scale efficiency than pure technical efficiency. Second, productivity progressed and technological change has more significant influence on productivity advance over the period between 2005 and 2009. Third, the circularity problem of the traditional Malmquist index is confirmed, and so the global Malmquist index without this problem are valid for the analysis. Conclusion: Though this study also has some limitations with the data of regional public hospitals with a short time span, it is the first study of hospitals using global Malmquist productivity index and later it can be expanded to private hospitals and longer time periods.

• 로봇학회논문지
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• 제4권4호
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• pp.327-333
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• 2009

This paper describe the riding robot system named by "RideBot" which is a riding robot like as a horse. In order to simulate the riding motions, we develope the saddle mechanism which can generate 3 DOF motions including pitch, roll, and bounce movement, and also we controlled the riding motions and the intention of horseman. To generate the riding motions with the bodily sensation, we developed Novel Washout Filter and the algorithms for motion control. And also, we developed some health care service for the health care of horseman. A body state index was proposed that evaluates the personal health state from both the measured physiological variables and the surveyed questions. The physiological variables such as weight, blood pressure, heart rate variability (HRV), accelerated state photoplethysmograph(APG), body fat, and happiness index were measured by the specially designed bio-handle system and survey questions. The efficiency of the proposed ride robot is evaluated in the experiments.

• Spatial Information Research
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• 제10권1호
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• pp.61-76
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• 2002

최근 무선 인터넷의 급속한 확산과 휴대장치 기술의 발전으로 PDA를 이용한 모바일 지도 서비스가 보편화되고 있다. 지도 서비스를 위한 공간 데이터는 용량이 크고,공간 연산 또한 비용이 매우 간 반면 PDA는 저장 장치의 용량이 작고 프로세서의 성능이 낮다 따라서 PDA용 공간 색인은 작은 규모이면서도 총간 연산의 여과 효율이 좋아야 한다 이 논문에서는 저용량, 낮은 성능의 PDA에 적합한 총간 색인 구조인 MHF를 제안한다. MHF는 간단한 구조로 공간 효율성을 높이면서, 직접 탐색 방법인 해슁을 도입하여 검색 효율을 높였다. 그러고 2차인 총간 색인의 80%이상을 차지하는 치소 경계사자형(MBR) 정보를 압축하기 위한 HMBR을 제안한다. HMBR은 MBR의 표현량을 약1/3으로 단축함에도 불구하고, 공간 데이터의 대부분을 차지하는 작은 객체인 경우에는 정량화에 의한 정보 손실이 전혀 없어 여과 효율이 좋다. 실험 결과 색인의 크기, MBR 비교 연산 횟수, 여과 효율, 공간 연산의 수행 시간 측면에서 제안한 HMBR을 이용한 MHF 공간 색인이 PDA에 가장 적합한 구조임을 보여주었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.1253-1258
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• 2006

As a global effort to conservate the environment, life cycle assessment(LCA) which considers the environmental impact through the life cycle of a product, from acquiring of resources to scrapping, has been actively applied. The LCA is a tool to calculate quantitatively the environmental impacts caused by products or services through their life cycles. Eco-efficiency need that express value of environmental impact provision EMU and develops in two forms according to use target of Eco-efficiency as a tool that environmental impact of EMU. It is a strategic instrument which assists stakeholders to understand which products, processes or services to target with future investments and which are not by comparing economic and ecological values. The results stand for aggregated information on economical value and environmental impact. Also, In this method, it is important to derive EPI(Environmental Performance Index) and SPI(Service Performance Index) from the sources available. The following is used as one of Eco-efficiency tools to achieve the target performance of processes, products and services for designer or projector. According to the eco-efficiency methodology for EMU developed in this study, the user definition and the DB design were carried out as a basic design of eco-efficiency S/W.

• 품질경영학회지
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• 제38권1호
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• pp.34-41
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• 2010

This paper proposes the compliance collaboration index(CCI) which can be useful to measure the level of supply chain's compliance collaboration quantitatively. It can be shown that the proposed index is quite flexible when applied in real situations at the request of the index user. For instance, even if only one company of many companies in trade supply chain to be tested through the AEO certification test is not satisfied the required specification. the index is designed in such a way that the score can't be higher than a certain predetermined value. The proposed CCI can be used as the guidance for a trade company's collaboration process control strategy to increase the efficiency of compliance improvement activity. In this paper, we use the Analysis Hierarchy Process(AHP) which is one of the methods recommended by ISO/ICE as a measurement of weight to be assigned to the relevant parameters considered in the CCI.

• 한국정보통신학회논문지
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• 제13권5호
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• pp.835-844
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• 2009

최근 정보가 미치는 영향력이 높아지고 정보서비스의 만족도 평가에 대한 관심이 높아지고 있는 실정이지만 정보의 다양한 특성들 때문에 정보와 정보서비스의 정확한 자치를 측정하고 평가하는 것은 복잡하고 다양한 방법을 요구하고 있다. 또한 정보제공서비스의 기능 및 효율성이 증시됨에 따라 정보제공서비스의 콘텐츠만족도와 서비스만족도, 시스템만족도 등에 관한 이용자의 만족도를 높이기 위한 만족도지수 측정에 대한 관심이 많아지고 있는 상황이다. 이에 본 논문에서는 인터넷 상에서 정보제공서비스를 하고 있는 ITFIND의 이용자만족지수(User Satisfaction Index)를 측정하여 보다 향상된 정보시스템 서비스 전략을 수립하고 개선방안을 도출하여 정보시스템 분야에서 이용자만족지수의 측정 결과를 통해 향후의 개선 방법 및 방안을 제시하고자 한다.