• The KIPS Transactions:PartD
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• v.19D no.4
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• pp.299-306
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• 2012

To fulfill the complex user requirement, composition web service comprised of existing services is considered from the efficient and reusable point of view instead of making entirely new web service. However, with the growing the number of web services which provide the same functionality but differ in quality value, the service composition becomes a decision problem on which component services should be selected such that end-to-end QoS constraints by the client and overall QoS of the composition service are satisfied. QoS of service aspects is a determinant factor for selecting the services, since the performance of the composed service is determined by the performance of the involved component web service. In this paper, hybrid genetic algorithm is presented to select component services to take part in the QoS-aware composition. The local search method is used to be combined with the genetic algorithm to improve the individuals (component service) in population as well as composed service. The paper also presents a set of experiments conducted to evaluate the efficiency of selection algorithm using the real web service data.

• Korean Business Review
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• v.19 no.2
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• pp.261-274
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• 2006

Airline business operates in the 21st century within fast changing market environment and fierce competition. Management of airline companies has faced the need for vast adaptation to new trends in the growth of world economy that are cardinal changes in marketing environment due to quick development of Internet and IT, transport price competition and, as a consequence, low profit margin, diversified customer wants and needs, lack of investment needed for new aircraft equipped with the latest high tech innovations, unpredictable oil price changes, and exchange rate fluctuations. This study is aimed to evaluate the quality performance of cabin service, to analyse, further, the issues that appeared to be the most significant among customers' answers to questionnaire, to explore the relationships between these issues and customer satisfaction, to highlight the essential questions to address, and to provide some practical suggestions. The five dimensions (such as tangible, reliability, responsiveness, assurance, and empathy) were adopted to examine the relationship between the service quality and customer satisfaction of Mongolian and non-Mongolian passengers travelling by the MIAT. According to findings of analysis made with use of the SERVPERF model, it can be concluded that Mongolian travellers' satisfaction was effected by 'Tangible' and 'Responsiveness' dimensions of service quality, whereas the 'Empathy' dimension has more impact on the satisfaction of non-Mongolian.

• Journal of the Society of Disaster Information
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• v.19 no.2
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• pp.383-394
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• 2023

Purpose : This study focuses on improvements in cell broadcast service(CBS) with consideration of socially vulnerable groups, and identifies service factors necessary for elderly people in particular. Method : Multiple regression analysis was applied to test overall satisfaction with cell broadcast service as the dependent variable and each of the service factors as the independent variable. Result : The results showed that fast delivery had the greatest effect on overall satisfaction with cell broadcast service in both groups, followed by the delivery of sufficient content for the elderly group and system quality for the non-elderly group. The results demonstrated that the elderly group cared more about information content, while the non-elderly group considered functions such as system quality and text message transmission criteria more important. Conclusion : Elderly people consider the delivery of sufficient information important as well as fast delivery, which suggests that it is necessary when sending cell broadcast service to give consideration to the characteristics of elderly people, as they tend to have weaker understanding and thinking abilities than the non-elderly.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.536-539
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• 2004

인터넷 서비스 수요의 급증으로 IP망의 대용량화와 고품질 서비스 제공에 대한 요구가 증대되고 있다. 이에 대해 네트워크 시설의 확충이나 트래픽 엔지니어링의 적용을 통해 대응해 왔으나, 멀티미디어 서비스 증가, 데이터 유형별 QoS 특성의 차이로 인해 기존에 적용해 오던 망 관리 시스템에의 의존에서 탈피, 현재 나타나고 있는 통신서비스 활동 특성의 변화를 감안, 실제 사용자의 서비스 이용 차원에서 고품질, 광대역 서비스를 제공해 줄 수 있는 관리 방안에 대한 모색이 필요하게 되었다. 이에따라, Intserv, Diffserv, RSVP, MPLS 등이 등장하였고, QoS 보증(SLA)에서는 서비스품질 보장 범위의 확대를 비롯한 다양한 고객요구가 증가하고 있는 상황이다. 이에 본 논문에서는 통신서비스 전반에 나타나고 있는 차별화된 프리미엄 서비스의 등장에 따른 QoS 보증방안에 대해서 다루고자 한다. 이를 위해, 우선 통신사업자의 네트워크 운용환경 변화방향에 대해 점검해 보고, 프리미엄 서비스의 도입이 가능한 대상과 범위에 대해서도 살펴본다. 이어서, 새로운 서비스 환경에서의 사업 기회와 진략 수립 방향, 법${\cdot}$제도적인 측면을 포함한 사업환경에 대한 시사점을 제공하고자 한다.

• Journal of Software Engineering Society
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• v.13 no.3
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• pp.92-97
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• 2000

양질의 소프트웨어제품과 서비스를 생산하는 방법은 우수한 선례를 답습하거나, 성공한 선례를 해당 응용업무에 맞도록 발전시키는 것이다. 즉 프로세스들의 모임인 소프트웨어 프로세스를 각각의 소프트웨어 서비스와 시스템의 개발목적에 부합하도록 정의하는 것이다. 프로세스 모임은 정보화사업의 포괄적 관리가 가능하게하며, 사업제기부서가 소프트웨어 시스템에 대한 전반적인 의무와 책임을 갖게 하며, 정보화사업 감리에 있어서 감리 목표 정립과 감리의 시행을 명확하게 한다. 소프트웨어 서비스 및 시스템 개발에 있어서 적합한 프로세스의 모임을 목표프로세스 프로파일(Target Process Profile) 이라고 명명하였다. TPP을 정의함에 있어서는 정의할 대상시스템의 성능과 시스템의 효과성이 어느 정도 가시화되는 여건에서, 소프트웨어 서비스 및 시스템의 수명주기 목표, 수명주기 아키텍쳐 및 수명주기 계획을 도출한다. 즉 아키텍쳐 접근방법, 소프트웨어프로세스의 정착, 및 국제표준의 프로세스에서의 프로세스 모임규칙을 근간으로 하여 TPP의 프레임워크(Framework)을 시안을 작성하였다. 소프트웨어공학의 발전과정에서 프로세스 능력의 성숙도 기준으로 프로세스 모임을 이룬것에 추가하여, 논자는 ISO/IEC 15504 TR 프로세스간의 전후관계에서 TPP을 위한 작업산출물 도출방법을 정의하였다. TPP에 의한 정보화추진은 정보화시대에서 소프트웨어 품질 및 가격에서 경쟁력을 가져오는 요인이 될 것이다.

• Culinary science and hospitality research
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• v.22 no.3
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• pp.44-54
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• 2016

This study examined the factors that affect the relationship between low price coffee shops service quality and brand image, and rrevisit intention. A total of 225 questionnaires were distributed to consumers, of which 210 were deemed suitable for analysis after the removal of 15 unusable responses. In order to perform statistical analyses required in the study, the SPSS 18.0 Statistical Program was used for frequency analysis, factor analysis, and reliability analysis, correlations, and regression analysis. The results of exploratory factor analysis showed that four factors regarding service quality were extracted from all measurements with a KMO of 0.864 and a total cumulative variance of 73.235%, With regard to brand image, one factor was extracted with a total cumulative variance of 66.497% and a KMO score of 0.885. One factor for revisit intention was extracted that accounted for a total cumulative variance of 60.192% and a KMO score of 0.845. All factors were significant to 0.000 and the correlation between variables was significant. Thus, based on the results, the main research hypothesis that identifies the relationship among service quality, brand image and revisit intention was partially adopted.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.695-698
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• 2008

오늘날 시장환경이 급변하고 다양한 비즈니스 요구에 부응하기 위해 IT Outsourcing 전략을 채택하고 있는 기업들이 증가하고 있다. 기업의 전반적 비용 효율성에 대한 인식이 증대하고 안정적 IT 서비스 지원을 통한 비즈니스의 연속성의 중요성을 인식한 기업들이 IT Outsourcing을 도입함으로써 국내 IT 서비스 시장은 꾸준한 성장세를 보이고 있다. 그러나 기존의 IT 서비스 제공 프로세스가 체계적이지 못하고 성과측정에 대한 표준안이 제대로 갖춰지지 못하여 고객기업들의 불만이 높아지고 있다. 이에 IT 서비스 기업들은 보다 고품질의 IT 서비스 제공하기 위해 Best Practice 기반의 ITIL을 이용한 ITSM 시스템 구축에 심혈을 기울이고 있다. 이에 국내 ITSM 시스템이 도입 초기 단계부터 선도적으로 구축한 I 사의 실제 구축사례를 소개하고 ITSM 시스템을 여러 다양한 기업에 적용하여 성과관리지표를 측정하여 ITSM 시스템 도입 기대효과의 실질적인 지침을 마련하고자 한다.

• Journal of KIISE:Software and Applications
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• v.34 no.4
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• pp.342-358
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• 2007

Ubiquitous Computing System (UCS) is a system where the user can get information through computer network anytime and anywhere regardless of the places. Since UCS is a personalized system, it should interact with other systems. UCS will bring a remarkable change in production, consumption, politics, economy, community, culture, and other areas related to our daily life. That is, a high-quality UCS results in high-quality services provided to users. Hence, this paper proposes a systematic quality model based on ISO/lEC 9126 in order to evaluate the ubiquitous computing system, based on ISO/lEC 9126. And, we identify key characteristics of UCS and derive the set of quality attributes based on identified characteristics. We define metrics for each quality attribute and Ubiquitous Computing Quality Model CUCQM) so that we can evaluate overall environment and important characteristics of UCS.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.4
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• pp.613-623
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• 2010

The purpose of this study was to examine parents' perceptions towards the importance and performance levels of foodservices quality at kindergartens. The questionnaire was developed to measure the thirty-one quality attributes of foodservice operations. A questionnaire survey was conducted to 500 parents and the return rates were 62.4%. The survey period was from July 15 to August 8, 2008. The parents had a high level of perception toward the need for foodservice, earning 4.46 points out of 5 point. Their perceptions of foodservice quality were examined by six dimensions of importance and performance level. While the parents gave 4 points or greater of 5 points to most quality attributes of importance level, they gave 4 points or less out of 5 points to most quality attributes of performance level. As for the importance and performance level of the quality dimensions of foodservice, parents regarded sanitation as the most important dimension. IPA showed that 'ventilation', 'sanitation of tableware' and 'sanitation of dining tables and chairs' were included as 'focus' areas. The overall satisfaction level for foodservice was 3.74 out of 5 points A higher level of satisfaction was shown at self-operated foodservice system of kindergartens. According to multiple regression analysis, 46.3% of the variance in the respondents' overall satisfaction scores was explained by factors such as food, menu and price, facilities, sanitation, atmosphere and foodservice effects.

• Journal of the Korea Computer Industry Society
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• v.2 no.7
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• pp.875-884
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• 2001

This study was attempted to find out the result of the comparison between participant group and absentee group of electronic commerce lecture in internet shopping mall. To find out difference among the burden for ordering, convenience for ordering, uneasiness for goods and service and satisfaction for goods and service, experimental approach was adopted. The finding were that burden for ordering, convenience for ordering and uneasiness for goods makes no difference, but satisfaction for goods and service make a difference. The result of the analysis in the research shows as following. First, they showed no difference between participant group and absentee group on the feeling burden during the ordering process. Second, they showed no difference between the two groups on the feeling of convenience during the ordering process. Third, they showed no difference between the two groups on the feeling of unstable for goods and service. Fourth, they showed no difference between the two groups on the feeling of convenience for goods and service.