• Asia pacific journal of information systems
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• 제15권3호
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• pp.41-64
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• 2005

The effects of information quality and the importance of information have been reported in the information Systems(IS) literature. However, little has been learned about the impact of data quality(DQ) on decision performance. Recognizing with this problem, this study explores the effects of contextual DQ on decision performance. To examine them, a laboratory experiment was conducted. Based on two levels of contextual DQ and two levels of task complexity, this study had a $2{\times}2$ factorial design. The dependent variables used to measure the outcomes of decision performance were problem-solving accuracy and time. The results demonstrated that the effects of contextual DQ on decision performance were significant. The findings suggest that decision makers can expect to improve their decision performance by enhancing contextual DQ. This research not only extends a body of research examining the effects of factors that can be tied to human decision-making performance, but also provides empirical evidence to validate and extend DeLone and McLean's IS success model.

• 품질경영학회지
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• 제43권4호
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• pp.499-510
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• 2015

Purpose: This paper treats the improvement of the quality and reliability of military weapon systems based on the maintenance data. Methods: The proposed method of the data integration and refinement are used to obtain the component reliability information and to find the frequently failed components based on the Pareto analysis. Based on the reliability information and the number of failed component frequencies, the target components of quality improvement are determined and improved by multiple methods such as engineering changes, special meetings, additional training and revising maintenance manuals. Results: Based on the proposed process, we find some components which need to be improved in order to enhance the quality and reliability. Conclusion: A process is developed for improving the quality and reliability of weapon systems. This process will be adopted by various weapon systems to enhance the quality and reliability, as well as reduce military spending.

• 한국산업정보학회논문지
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• 제13권5호
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• pp.197-213
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• 2008

본 논문은 대학정보시스템 품질특성이 학생들의 만족도에 미치는 영향에 관한 연구이다. 대학정보시스템의 품질 특성을 독립변수로, 정보시스템의 만족도를 매개변수로, 그리고 대학전반에 대한 만족도를 종속변수로 사용하여 그들 간의 상관관계를 분석하였다. 또한 사용자 특성(지역, 학년, 소속계열, 성별)이라는 조절변수를 사용하여 대학정보시스템 품질특성이 정보시스템의 만족도에 미치는 조절효과에 대한 연구를 하였다. 본 연구에서는 연구의 결과에 따라 급변하는 대학의 환경속에서 대학정보시스템의 운영 및 구축에 대한 시사점을 아울러 제시하고 있다.

• 한국정보시스템학회지:정보시스템연구
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• 제23권3호
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• pp.47-71
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• 2014

The purpose of the present study is to verify the structural relationship among system quality, information quality, service quality, perceived ease of use, perceived usefulness, satisfaction, intention on continuous use of mobile learning in cyber university. For this study, W cyber university in Korea was chosen to conduct web survey. The subjects were 283 students who participated in W's cyber university courses. A hypothetical model was composed of system quality, information quality, service quality, perceived ease of use and perceived usefulness as exogenous variables, satisfaction and intention on continuous use of mobile learning as endogenous variables. The result of this study through structural equation modeling analysis is as follows: First, information quality only affect satisfaction, Second, perceived ease of use, perceived usefulness and satisfaction significantly affect intention on continuous use of mobile learning. These results imply that information quality should be considered for the design and development of mobile learning contents. Also, perceived ease of use, perceived usefulness and satisfaction is important to enhance intention on continuous use of mobile learning. This study proposes strategies for successful mobile learning in cyber university.

• 디지털콘텐츠학회 논문지
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• 제15권1호
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• pp.45-52
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• 2014

모든 의료정보시스템에는 이해관계자와 환경이 존재한다. 의료정보시스템 개발 시에는 이 같은 환경에서 사용자의 기능적 요구사항과 비기능적 요구사항인 품질을 만족시켜야할 목표가 있다. 이 목표를 달성하기 위하여 현재 다양한 방법으로 정보시스템 개발이 이루어지고 있고 다양한 애플리케이션이 등장하고 있다. 그러나 이 같은 의료정보시스템 개발의 과정에서 기본적인 요구조건을 만족하고 있는지는 별도의 관점에서 고찰하지 않으면 안 된다. 본 연구는 유-헬스케어 서비스 소프트웨어아키텍쳐 품질확보를 위한 요구사항 분석방법을 제안한다. 의료정보시스템의 요구사항 분석을 통해 소프트웨어아키텍처 품질평가 사항과 의료정보서비스 품질평가 연계지표 평가방식을 제안했다. 이 방법은 연계성 팩터의 품질 합계치를 산출하고 그 추이를 분석하므로서 유-헬스케어 소프트웨어아키텍쳐에 대한 종합평가가 가능하게 한다. 품질평가는 요구사항 분석에서 도출된 목표와 비교하여 달성도를 분석하며 만족도 수준이 미진한 분야를 발췌하여 원인분석 및 개선작업에 활용이 가능하다.

• Journal of Information Technology Applications and Management
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• 제24권3호
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• pp.73-92
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• 2017

Usability is one of the most important concepts regarding software quality. It can be interpreted as the goodness associated with using the software product. This paper distinguishes the goodness of an individual using experience and the goodness of a product for using. This paper proposes a software quality view model which classifies software quality views into two broad categories of end view and means view. End view includes long-term view and short-term view which is classified further into performer's view on software activity and third party's view on software activity. Means view includes intrinsic view and contingency view. The analysis of ISO 25000 Series SQuaRE demonstrates the necessity to decompose product quality model and quality in use model into five models corresponding to the software quality views respectively. The analysis on playability shows that the universal definition of usability may be an illusion. The results provide the theoretical basis to build a comprehensive and consistent body of knowledge regarding software quality, which is consisted with the set of quality models and the theories explaining the relationships among the elements of the models.

• Journal of Information Technology Applications and Management
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• 제11권2호
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• pp.45-64
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• 2004

Many researchers have proved that information systems auditing is a very effective tool for improving information systems quality. However, information system auditing in Korea still includes many subjective judgements. This study deals with applying a quantitative model to improve information system auditing quality on security domain. First of all, we have looked at previous researches on information systems audit, especially on security audit. Based on this survey, we have come up with solutions to improve the evaluation efficiency on security audit. We have merged the security audit guidelines of NCA and KISA, and developed a quantified evaluation scheme. We have proved the validity of this model by interviews with experts and by case studies.

• Journal of Information Science Theory and Practice
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• 제3권4호
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• pp.19-34
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• 2015

Evaluation of retrieval systems is mostly limited to laboratory settings and rarely considers changes of performance over time. This article presents an evaluation of retrieval systems for internal Web site search systems between the years 2006 and 2011. A holistic evaluation methodology for real Web sites was developed which includes tests for functionality, search quality, and user interaction. Among other sites, one set of 20 Web site search systems was evaluated three times in different years and no substantial improvement could be shown. It is surprising that the communication between site and user still leads to very poor results in many cases. Overall, the quality of these search systems could be improved, and several areas for improvement are apparent from our evaluation. For a comparison, Google’s site search function was also tested with the same tasks.

• 한국융합학회논문지
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• 제2권4호
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• pp.21-27
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• 2011

현재 신 재생에너지 보급사업에 의해 설치되고 있는 태양광전원설비가 전력계통과 연계 운영될 경우 배전계통의 전력품질 요소에 어떠한 영향을 미치고 있는지를 모의시험을 통해 정확히 측정 분석하여 향후 분산형전원의 확대 보급에 따른 가이드라인의 구축과 기술적인 연계지침이 필요한 상황이다. 따라서 본 논문에서는 태양광이 연계되는 위치에 따른 선로임피던스($R{\pm}jX$)에 의하여 생기는 전압상승 및 하강에 의한 전력품질[Sag/Swell] 저하 현상에 대하여 태양광전원용 LabVIEW 프로그램을 통해 전력품질 시험을 수행하여 그 특성을 분석한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권10호
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• pp.3361-3377
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• 2014

Synchronous computing models provided by real-time synchrony protocols, such as TTA [1] and PALS [2], greatly simplify the design, implementation, and verification of real-time distributed systems. However, their application to real systems has been limited since their assumptions on underlying systems are hard to satisfy. In particular, most previous real-time synchrony protocols hypothesize the existence of underlying fault tolerant real-time networks. This, however, might not be true in most soft real-time applications. In this paper, we propose a practical approach to a synchrony protocol, called Quality-Aware PALS (qPALS), which provides the benefits of a synchronous computing model in environments where no fault-tolerant real-time network is available. qPALS supports two flexible global synchronization protocols: one tailored for the performance and the other for the correctness of synchronization. Hence, applications can make a negotiation flexibly between performance and correctness. In qPALS, the Quality-of-Service (QoS) on synchronization and consistency is specified in a probabilistic manner, and the specified QoS is supported under dynamic and unpredictable network environments via a control-theoretic approach. Our simulation results show that qPALS supports highly reliable synchronization for critical events while still supporting the efficiency and performance even when the underlying network is not stable.