OLTP서버 규모산정방식의 개선에 관한 연구

나종회(Jonghei Ra),최광돈(Kwangdon Choi) 한국IT서비스학회 2009 한국IT서비스학회지 Vol.8 No.3

Hardware sizing is determinated by an increasing rate of operated business and characteristic of adapted technology which are imported systems. Because it is very difficult for intuitive decision of hardware sizing's appropriateness. But in sprite of difficulty, for maximizing the utilization of information resource and the effect of information investment in public sector are need to correctness hardware sizing. In this paper, we proposed hardware sizing method for OLTP server that is make up it's faults of proper proposal method. Our study certainly will act as a catalyst for higher investment-efficiency of future information systems in public sector.

정보시스템 감리제도 개선방안에 관한 탐색적 연구

나종회(Jonghei Ra),오강탁(Kang-tak Oh),최영진(Youngjin Choi) 한국지역정보화학회 2016 한국지역정보화학회지 Vol.19 No.3

정보시스템감리는 공공부문 정보화사업에 대한 전반적인 관리수준, 시스템의 품질 및 만족도 향상 등 긍정적인 평가와 더불어 형식적인 감리수행 등의 문제로 인해서 감리 무용론에 대한 주장도 제기되고 있다. 또한, 수발주제도 등의 감리 수행환경 변화와 더불어 신기술 위주의 감리에 따른 기술적 복잡도 증가로 감리수행 위험이 날로 증가하고 있는 상황이다. 따라서 본 연구에서는 정보시스템 감리품질 개선을 목적으로 기존감리현황을 토대로 주요한 문제점을 식별하고, 식별된 문제점과 연계하여 감리실태파악을 위한 설문조사를 수행하였다. 설문조사결과를 토대로 FGI를 통해 정보시스템 감리 개선과제 및 추진 우선순위 결정함으로써 최종적으로 감리 품질 향상을 위한 제도개선방안을 제시하고자 하였다. Information System Audit are being recognized effects and improve the management level and quality of information systems and satisfaction of public sector ICT projects. But on the other hand it has also been raised formally carried out and claims does not have a lot of quality to the minor problems noted in the Information Systems Audit. In addition, Information System Audit risk is growing day by day that change of Information System Audit carrying environment and perform the technology-oriented Information System Audit. The purpose of this Information Systems Audit Quality Improvement, in this study, carried out the survey, and to suggest ways to improve the system for quality supervision.

정보시스템 용량산정방식에 관한 탐색적 연구 : 공공부문 H/W 규모산정을 중심으로

나종회(Jonghei Ra),최광돈(Kwangdon Choi) 한국IT서비스학회 2004 한국IT서비스학회지 Vol.3 No.2

Interest about Information infrastructure construction is enlarged socially according to arrival of information age, and various information systems are constructed for efficient business processing, customer service in public sector. According to subjective method for performance improvement for information system of public sector and engine that propel information system construction because it is no definite hardware sizing guidelines for information system caterer is calculating resource volume of information system. It is situation that problem of excess of scale or reduce sizing is happening and is causing various kind of problems that is waste of information budget and service decline thereby. In this research we proposed hardware sizing framework for information system that is applied to public sector.

계산에 기초한 하드웨어 도입 규모산정 방식 연구

나종회(Jonghei Ra),최광돈(Kwangdon Choi),정해용(Haeyong Jung) 한국IT서비스학회 2006 한국IT서비스학회지 Vol.5 No.1

  According to the policy for "e-Korea construction" of Korean government, Investment of information system during the past decade are dramatically increasing. More than a half of this investment is cost of hardware infrastructure. So, accurate hardware sizing are essential for higher efficiency of investment. Accurate hardware sizing benefits are generally viewed in terms of the avoidance of excess equipment and lost opportunity costs by not being able to support business needs. Unfortunately, however, little research effort to make the hardware sizing methodology are doing. We propose a sizing method for information system in public sector. This method is determinate empirical study that are gathering and analyzing cases, making method and reviewing expert. Finally we are proposed calculating method for hardware components that is CPU, memory, internal and external disk according to the application system type which is OLTP, Web, WAS. Our study certainly will act as a catalyst for higher investment-efficiency of the future information programs in public sector.

정보시스템 통합단계별 성과측정 모형 및 물리적 통합단계의 측정지표 개발에 관한 연구

정해용(Haeyong Jung),나종회(Jonghei Ra) 한국IT서비스학회 2008 한국IT서비스학회지 Vol.7 No.4

This study aims to develop an integration performance measurement model for each stage of information systems integration. In order to achieve the purpose of the research, first of all, the concepts of IS integration or consolidation are analyzed through theoretical and practical reviews. Also, a number of important studies of domestic and overseas cases about the stage models of IS integration or consolidation are critically reviewed. Second, we proposed three step stage model of IS integration, Physical Integration stage, Application Integration stage, Service Integration stage, and Also proposed the performance measurement model for each stage of information systems integration. Third, especially in case of performance indicators and performance measurement methodology for physical integration stage are illustratively proposed, based upon the case of NCIA (National Computing Integration Agency) in Korea. This study provides the theoretical basis for reasonably deriving the stage model and performance measurement model for each stage of Information Systems Integration, and they are validating through investigating domestic and foreign practices. The results of this study are very likely to contribute to presenting the practical guideline for desirably implementing IS integration or IS consolidation.

지식정보 관리기관을 위한 정보시스템 감리 추진방안에 관한 연구

이상준(SangJun Lee),나종회(JongHei Ra),고형대(HyungDae Go),신기정(KiJung Shin) 한국IT서비스학회 2006 한국IT서비스학회지 Vol.5 No.3

  With the growth and maturation of IT industry, the necessity of audit about development, maintenance and management of high-quality information system is gradually increasing. In addition, the necessity of inner auditing system, which could totally verify and evaluate the effectiveness of project according to the characteristics of organization conducting information-oriented business, also being proposed. Government offices including Korea Institute of Science and Technology(KISTI) collectively controlling nationwide science-technology related information have no guiding principle or organization within themselves even though performing information-oriented businesses are becoming more bigger and complicated. In this paper, we propose scheme for devising framework, which can audit construction and operation of knowledge information, check list and guideline. In addition, we present concrete ways for adapting these schemes to institutes which manage science-technology knowledge information. Audit framework consists of points of time in audit, audit domain and audit criterion. Points of time in audit are defined as three phases as followings: pre-audit, in-progress audit and post-audit. Audit domain includes 16 detail audit domains and especially we set 11 check items and 40 detail investigation items for database implementation business. We expect that management level of science-technology implementation business of organizations using this research result will increase and they could offer high-quality information service.

정보시스템 감리 이해집단별 감리효과 결정요인에 관한 탐색적 연구

최영진(YoungJin Choi),정용규(YongKyu Jung),나종회(?JongHei Ra) 한국경영과학회 2017 經營 科學 Vol.34 No.2

IS audit has been regarded as contributing to the improvement of the quality of information Systems, recently, it has been argued that it is not possible to expect a effectiveness, because it can offset the schedule burden due to the preparation of additional documents for Audit and it affect to the project schedule. The effectiveness and quality criteria of IS audit are different between groups, because IS audit is responsible for checking the results and process of the developer company. In this study, we modeled between IS effectiveness and auditor competence, audit firm competence, IS audit standards. As a result, it was concluded that auditor competence, audit firm competence, IS audit standards have a positive effect on IS audit effectiveness. However, according to the result of comparing between interest groups, audit firm competence and audit standards were significant in auditor group, but audit standard was significant in requesting organization and developing company thought that auditor was a important factor to audit effectiveness.