• Journal of Korean Institute of Industrial Engineers
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• v.42 no.4
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• pp.296-303
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• 2016

In public transportation, smart cards have been introduced for the purpose of convenient payment systems. The smart card transaction data can be utilized not only for the exact and convenient payment but also for civil planning based on travel tracking of citizens. This paper focuses on the analysis of the transportation convenience using the smart card big data. To this end, a new index is developed to measure the transit convenience of each region by considering how passengers actually experience the transportation network in their travels. The movement data such as movement distance, time and amount between regions are utilized to access the public transportation convenience of each region. A smart card data of five working days in March is used to evaluate the transit convenience of each region in Seoul city. The contribution of this study is that a new transit convenience measure was developed based on the reality data. It is expected that this measure can be used as a means of quantitative analysis in civil planning such as a traffic policy or local policy.

• Journal of Korea Society of Digital Industry and Information Management
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• v.19 no.4
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• pp.1-11
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• 2023

Clustering analysis is used in various fields including customer segmentation and clustering methods such as k-means are actively applied in the credit card customer segmentation. In this paper, we summarized the input features selection method of k-means clustering for the case of the credit card customer segmentation problem, and evaluated its feasibility through the analysis results. By using the label values of k-means clustering results as target features of a decision tree classification, we composed a method for prioritizing input features using the information gain of the branch. It is not easy to determine effectiveness with the clustering effectiveness index, but in the case of the CH index, cluster effectiveness is improved evidently in the method presented in this paper compared to the case of randomly determining priorities. The suggested method can be used for effectiveness of actively used clustering analysis including k-means method.

• Korean Journal of Community Nutrition
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• v.10 no.6
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• pp.905-919
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• 2005

This study raised the necessity of developing performance indicators for measuring the management efficiency and effectiveness of school food service, and as a means of helping its implementation, a balanced score card (BSC) approach developed by Norton and Kaplan was adopted. This study established BSC in seven phases through literature: Phase 1 Defining a school food service and the scope of working activities, Phase 2 Establishing the vision of a school food service, Phase 3 Setting strategic goals, Phase 4 Identifying critical success factors (CSFs), Phase 5 Developing Key Performance Indicators (KPIs), Phase 6 Extracting cause and effect relationship, and Phase 7 Completing a preliminary BSC. The preliminary BSC was fumed into a survey, which was administered to food service related people working at the Office of Education and School Food Service including 16 offices,209 dietitians, 48 school administrators both from self-operated and contract-managed, and 9 experts in areas related to school food service. They were asked questions about strategies from 4 different perspectives,12 CSFs, 39 KPls, and the cause and effect relationships among them. As a result, among the CSFs based on 4 different perspectives, all factors other than ' zero sum on profit/loss ' from the financial perspective turned out to be valid. In terms of KPIs, manufacturing cost percentages, casualty loss count/reduction rates, school foodervice participation rates, and sales goal achievement rates were found to be valid from the financial perspective, while student satisfaction index, faculty satisfaction index, leftover ratio, nutrition educational performance count, index of evaluating nutrition education, customer claim count/reduction rate, handling customer claim count/reduction rate, and parent satisfaction index were found to be valid from the customers' perspective. Besides, nutritional requirement sufficient ratio, nutritional management score, food poisoning outbreak count, employee safety accident count, sanitary inspection assessment index, meals per labor hour (productivity index), computerization ratio, operational management index, and purchase management assessment index were also found to be valid from the perspective of internal business processes. From the perspective of innovation and learning, employee turnover ratio/rate of absenteeism, annual education and training count, employee satisfaction index, human resource management assessment index, annual menu-related customer feedback, food service information index for employees and parents/schools were also found to be valid. The significance of this study is to present indices for measuring overall performance of school lunch food service operations without putting any limitation on types of school food service management, and to help correctly assess the contribution of the current types of school food service management to schools and students. (Korean J Community Nutrition 10(6) : $905\∼919$, 2005)

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2002.11a
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• pp.215-218
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• 2002

감성정보를 디자인 활동에 필요한 정보로 활용하기 위해서는 전체 디자인 프로세스에서 사용자를 최초 컨셉 단계에서부터 참여시켜 관찰 및 평가에 적극 동참케 하는 사용자 참여 디자인이 매우 효과적이다. 이러한 감성 정보 수집 및 평가를 통한 상용자 인터페이스 디자인 개발 프로세스를 MP3 CDP를 대상으로 적용하여 연구를 진행하였다. 최근의 MP3CD Player들은 일반 음악 CD들이 10여곡에서 많게는 20여곡 정도의 분량을 가지고 있는 것에 비해 그 분량이 최고 100여곡 이상에 이르고 있다. 그럼에도 불구하고 MP3CD Player들은 기존의 일반 음악 CD Player의 UI를 소극적으로 수정, 변경하여 사용하고 있는 상황이다. 본 연구는 자체적인 곡 분류방법을 제시하고 있는 ‘H’사의 MP3CD Player를 선정하고 이를 기준으로 초기 디자인에 사용자를 참여시켜 사용자 감성 정보 및 요소들을 효과적으로 평가하여 사용자 중심 디자인을 극대화 시키는 방법을 모색하였다. 제품의 최초 기능 분석시에는 카드인덱스(Card Index)방식을 이용하여 기능을 그룹핑하고 인터페이스를 개선하였으며 이를 토대로 프로토타입을 완성하였다. 이를 사용자가 직접 조작하는 방식을 관찰 분석하여 평가 결과를 토대로 UI 디자인가이드라인을 제시하였다.

• The Korean Journal of Applied Statistics
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• v.21 no.2
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• pp.211-219
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• 2008

Customer Loyalty is very important for a company to be survived and to make profit for a long time. Especially, since the credit card company has to manage proper card members and merchants, the CRM(Customer Relationship Management) is much emphasized. A loyalty score is more essential to credit card companies which provide differential financial services based on card members and merchants than any other companies. In this paper, we discuss behavioral measures to define customer loyalty and suggest a method to make loyalty score with an example of a credit card company. The loyalty score developed is considered easy to understand and simple to apply in card industry. In the development of loyalty score, first, we define the loyal customers and non-loyal customers by measuring variables indicating loyalty. And we perform individual logistic regression by each exploratory measuring variable and obtain the weight of measure variables using Chi-square statistics which is used for model fitness. The loyalty score suggested shows very stable results in terms of PSI (Population Stability Index) as time goes.

• Proceedings of the Korea Society of Design Studies Conference
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• 2002.11b
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• pp.66-67
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• 2002

• The Journal of Fisheries Business Administration
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• v.46 no.1
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• pp.121-143
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• 2015

This study focuses on the case of FIRA(Korea Fisheries Resources Agency) and analysis the introduction effect of BSC(Balanced Score card) implementation. So it will set forth the improvement method and the implications for Quasi-governmental organizations which are trying to introduce or are operating the BSC system. This study suggests how to improve the problems of BSC as below : (1) Building of reasonable and balanced evaluation index system (2) Acquiring of comparability and equality through adjustments of group evaluated (3) Enhancing of competence and professionalism of evaluating group (4) Alleviating of difference gap of performance incentives and promoting of non-money incentives (5) Enhancing of positive acceptance and recognition for BSC.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.1
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• pp.58-65
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• 2010

The research which sees is to paying in advance and or the after non traffic card use composes shortens about the method which sorts the difference of the method which with the thing is proposing from card system of existing and that system improves only the unable card or serviceable card information and the response time of the system operation and to improve the method which composes information, control method preparation improved a updating speed and effectiveness of system improvement at the time. The respectively file composed with the multiple mind section from the research which sees hereupon and also each section composed of the multiple mind block and each block multiple mind divided at size of the unit which will count and with the index father whom composes more kicked a low-end ratio use wrongly or in serviceable card information and the low to compose with the data bringing up for discussion territory which composes of information the efficiency of system, improved.

• Journal of Korean Society of Disaster and Security
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• v.13 no.1
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• pp.25-39
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• 2020

Despite the global promotion of Smart City, there is currently no standard for smart water grid development, and it is not possible to judge the success of Smart City. There is a clear need to establish the requirements and goals of the Smart Water Grid and accurately diagnose and improve the limitations and problems of the existing Smart Water Grid. For this purpose, it is very important to use the index suitable for Smart Water Grid goals. In this study, we developed Smart Water Grid Index which can be used to evaluate the target measurement and attainment of Smart Water Grid and can be utilized based on the implementation plan for Smart Water Grid in the future. Through the development of the Smart Water Grid Key Performance Index (SWG KPI), we will lay the groundwork for continuous capacity evaluation of the Smart Water Grid and improve the reliability of the Index. It is expected that it will be possible to prepare and evaluate a Challenge Evaluation Card for the planned Smart Water Grid by providing an evaluation table for grid competency evaluation.

• Journal of Technology Innovation
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• v.13 no.2
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• pp.45-70
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• 2005

Much work on innovation has focused on the manufacturing sector. In this paper, we propose a framework for analyzing innovation in services centred on capability and technology integration. We illustrate the theoretical points made by conducting a case study on an international telephone communications provider Brastel, which introduced significant innovations in international calling services, in the form of rechargeable pre-paid calling card, through effective application of standard IT. Brastel is situated against its main competitors, considering two dimensions of price and service breadth and convenience. A novel technique for measuring competitiveness based on price and service index is introduced. The following competitors were selected: NTT, KDDI, Japan Telecom, Fusion Communications, J-Call / World Link, G-Call, ASP Check, Primus, QuickPhone, and MCI. To create the service index, factors such as ease of use, convenience, number of languages in which the services are available, and additional features were taken into account. The company itself and the rechargeable card innovation were analyzed through in-depth interviews and data collection. It was shown that a competitive advantage was maintained through internal and external capabilities.