• 경영과학
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• 제28권1호
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• pp.11-24
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• 2011

In this paper, we develop a new conceptual framework for finding new business opportunities in the cloud computing environment. We propose a service model framework for cloud computing business. In the service concept of the proposed business model, we categorize customer needs and service offering value, while we analyze customer behavior for developing revenue model. In addition, we analyze cloud computing market drivers for finding an evolution path of the proposed business model. Finally, we develop cloud computing business strategies for Korean IT service industry.

• Journal of Information Processing Systems
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• 제16권6호
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• pp.1281-1292
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• 2020

More and more cloud computing services are being applied in various fields; however, it is difficult for users and cloud computing service platforms to establish trust among each other. The trust value cannot be measured accurately or effectively. To solve this problem, we design a service-oriented cloud trust assessment model using a cloud model. We also design a subjective preference weight allocation (SPWA) algorithm. A flexible weight model is advanced by combining SPWA with the entropy method. Aiming at the fuzziness and subjectivity of trust, the cloud model is used to measure the trust value of various cloud computing services. The SPWA algorithm is used to integrate each evaluation result to obtain the trust evaluation value of the entire cloud service provider.

• 한국IT서비스학회지
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• 제14권2호
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• pp.289-314
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• 2015

Recently, Most of the companies and government offices are under consideration about the adoption of cloud office service to actualize the smart work policies. Comparing with traditional office software, a cloud office service have the advantage of the method of payment and coming over the physical limitations. Many cloud office service users tend to adopt an official evaluated the service without doubt. However after deciding to adopt cloud office service, many users are faced with a variety of problems and difficulties practically. In this study, researchers carried out interview about those problems and difficulties after adopting a cloud office service. Consequently, there are several problems and difficulties such as compatibility, document security, document lost and maladjusted to the new graphic user interface between traditional office software and a cloud office service. A cloud office service have still several advantages not only a competitive price but also ubiquitous attributes. Thus, researchers need to study about what kinds of reason variables can solve those problems and difficulties. In existing research, DeLone & McLean have suggested information system success model. They use three independent variables which are system quality, information quality, service quality. Parameters are user satisfaction, intention to use and use. Lastly, dependent variables are net benefits. However in this study, we need to change the scope of measurement. In other words, we have to replace parameters with dependent variables. Simply, user satisfaction, intention to use and use is going to be dependent variables. There are several reasons why we need changing variables. First, we aim at giving a some suggestions to a cloud service providers which independent variables do not work to satisfy for the users. Second, we need to find out how to maximize cloud office service user's satisfaction and intention to use. Third, we should firstly know that relationship between independent variables and dependent variables. Finally, those research results give for the cloud office service provider to solve the cloud office service adopting problems and difficulties.

• 한국IT서비스학회지
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• 제11권2호
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• pp.107-118
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• 2012

Recently, as the clouding computing begins to receive a great attention from people all over the world, it became the most popular buzz word in recent IT magazines or journal and heard it in many different services or different fields. However, a notion of the cloud service is defined vaguely compared to increasing attentions from others. Generally the cloud service could be understood as a specific service model base on the clouding computing, but the cloud, the cloud computing, the cloud computing service and cloud service, these four all terms are often used without any distinction of its notions and characteristics so that it's difficult to define the exact nature of the cloud service. To explore and analyze the cloud service systematically, an accurate conception and scope have to be preceded. Therefore this study is to firstly clarify its definition by Delpi method using expert group and then tries to provide the foundation needed to enable relative research such as establishing business model or value chain and policies for its activation to set off. For the Delpi, 16 experts participated in several surveys from different fields such industry, academy and research sector. As a result of the research, Characteristics of the Cloud Service are followings : Pay per use, Scalability, Internet centric Virtualization. And the scope as defined including Grid Computing, Utility Computing, Server Based Computing, Network Computing.

• 한국IT서비스학회지
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• 제13권3호
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• pp.201-219
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• 2014

This paper considers service deployment and priority optimization for multiple service-oriented applications sharing reusable services, which are deployed as multiple instances in the cloud. In order to handle variations in the workloads of the multiple applications, service instances of the individual reusable services are dynamically provisioned in the cloud. Also service priorities for each application in a particular reusable service are dynamically adjusted. In this paper, we propose an analytic performance model, based on a queueing network model, to predict the expected sojourn times of multiple service-oriented applications, given the number of service instances and priority disciplines in individual reusable services. We also propose a simple heuristic algorithm to search an optimal number of service instances in the cloud and service priority disciplines for each application in individual reusable services. A numerical example is also presented to demonstrate the applicability of the proposed performance model and algorithm to the proposed optimal decision problem.

• 경영정보학연구
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• 제17권1호
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• pp.1-18
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• 2015

최근 많은 IT 기업들이 클라우드 서비스 시장에 진입하면서 출시되는 클라우드 서비스의 숫자가 크게 늘어나고 있다. 이러한 이유로 발생하는 클라우드 서비스 선택의 문제들을 해결하고, 기술적인 역량이 부족한 클라우드 서비스 사용자들의 서비스 초기화와 운용을 돕기 위해서 클라우드 서비스 중개업 회사들이 크게 주목받고 있다. 본 연구에서는 원 클라우드 서비스 제공자들과 클라우드 서비스 중개업 회사들 간의 협업을 대표적인 사례들인 국내의 NCloud24와 미국의 RightScale을 통해 보았다. 두 회사의 비즈니스 모델을 비즈니스 모델 캔버스를 사용하여 분석하였으며, 클라우드 서비스 중개업 회사들의 출현을 IaaS(Infrastructure-as-a-Service) 클라우드 서비스 회사들의 언번들링(Unbundling) 과정으로 해석하였다. 그리고 두 사례간의 차이점을 비교하고, 이를 바탕으로 향후 국내 클라우드 서비스 중개업이 나아가야 할 방향에 대하여 조망하였다.

• 디지털융복합연구
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• 제13권2호
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• pp.1-11
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• 2015

조직마다 클라우드 시스템을 도입하여 고객에게 고품질의 서비스를 제공하는 기업이 급증하고 있다. 그러나 고객의 요구사항이 너무나 다양하고 클라우드 시스템마다 달라서, 적합한 클라우드 서비스 제공의 진입장벽으로 작용하고 있다. 클라우드 서비스가 다양화 복잡화되고 클라우드 보안에 대한 우려가 지속됨에 따라, 클라우드 서비스 전문성을 보유한 CSB(Cloud Service Brokerage)기업의 필요가 증대되고 있다. 이에 따라 각종 서비스를 분석하고, 법규제 지원, 보안 및 호환성 문제, 최적의 서비스를 찾아 새로운 비즈니스 설계를 통하여 환경에 맞춰 서비스를 제안하고, 구현 관리 해주는 서비스 중개업(CSB)이 필요하게 된 것이다. 본 연구에서는 중개업(CSB) 육성모델을 제시하고, 클라우드 서비스 비즈니스 모델 발굴에 어려움을 격고 있는 협동조합에 적용하는 정책방안을 제시하였다.

• 한국IT서비스학회지
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• 제12권4호
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• pp.1-23
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• 2013

This study examines whether key characteristics of cloud computing services would affect the intention of use for personalized cloud computing services. The research model was generated based on Technology Acceptance Model (TAM) with resistance variable, and verified statistically by undertaking a survey about the perception of personal users. As the results of this analysis, we could find the structural relationship among the factors affecting adoption of the cloud computing service. We found that the expectation of ubiquity as a representative function of the cloud computing service meaningfully affected the perceived ease of use and resistance, and that the relativeness with existing services also meaningfully affected the perceived ease of use, but not the resistance. In addition, the moderating effects of use experience in the path leading from the perceived ease of use and resistance to the intention of use were identified. This study will provide diverse implications for the companies providing personalized cloud computing services.

• 정보보호학회논문지
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• 제25권5호
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• pp.1245-1255
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• 2015

클라우드 컴퓨팅의 성장과 더불어 클라우드 이용자 데이터 보안에 대한 우려가 증가하고 있으므로 이러한 우려를 감소시키는 것이 클라우드 컴퓨팅에서 필수적이다. 본 논문에서는 클라우드 컴퓨팅에 대한 정의 및 장단점을 설명하고 클라우드 컴퓨팅 발전법에서 정의하고 있는 이용자 정보 보호 규정에 대해 논한다. 다음으로 클라우드에서의 개인정보 보호 논점 및 개인정보 위 수탁에 관한 기존 연구 내용을 살펴본다. 그리고, 클라우드 서비스 유형에 따른 개인정보 저장 방식의 차이를 살펴보고 이로 인해 클라우드 서비스 별로 개인정보의 위 수탁 관계가 달라져야 함을 논한다. 이를 바탕으로 IaaS와 SaaS 클라우드 서비스 유형별로 개인정보를 보호하는 방안을 제안한다.

• 지식경영연구
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• 제18권4호
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• pp.237-260
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• 2017

Recently, with the proliferation of smart phones and mobile devices and the increase in the speed of mobile Internet, IT services are increasingly used in smart phones and mobile devices in a different way from the past. That is, a cloud service that downloads and uses data stored in the server in real time is expanding, and as a result, the security due to the continuous Internet connection of the user becomes a problem. In this study, we analyzed the relationship between factors affecting the continuous use of personal cloud service by using technology acceptance model. In addition to the technology acceptance model, confidentiality, privacy, accessibility, innovation, and self-efficacy were extracted from the existing research with emphasis on the characteristics of the cloud service and security factors. Moreover, the difference of intention to use among genders was verified through structural equation modeling with survey data from 262 personal cloud service users.