• Proceedings of the Korea Society for Simulation Conference
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• 2005.05a
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• pp.50-55
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• 2005

웹 서비스와 웹 프로세스(Web Processes)는 다양한 시스템 상에서 이종의 소프트웨어 컴포넌트들을 효과적으로 통합할 수 있는 기술이다. 웹 서비스의 활용이 증대함에 따라 성능(performance), 비용(cost) 등 005(Quality of Service)는 서비스 제공자들 간의 차별화를 위한 요건으로 그 중요성이 증가하고 있다. 본 논문에서는 웹 서비스 성능 분석 도구인 sPAC(Web Service Performance Analysis Center)을 소개하여, 웹 서비스 조합시 성능의 만족 여부를 미리 고려할 수 있음을 보인다. sPAC은 1) 그래픽 기반 웹 프로세스 구성 환경을 제공, 2) 경부하(light load) 조건에서의 성능 테스트를 위해 웹 서비스를 호출, 3) 웹 프로세스에 대한 시뮬레이션 모델을 자동 생성 하여, 과부하(heavy load) 조건에서 시뮬레이션 기반의 성능 분석 수행, 4) 웹 서비스의 성능 분석 결과와 평가 데이터의 보고서 생성을 제공한다.

• Journal of Information Technology Services
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• v.8 no.1
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• pp.113-124
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• 2009

Value-based requirements engineering process, called The ViRE(Value-Innovative Requirement Engineering) was suggested to create an uncontested market using ERRC(Eliminate, Reduce, Raise, Create) requirements analysis. But ViRE did not provides a quantitative data analysis method for ERRC decision so as to make objective decisions for customers. In this paper, to solve this problem, we suggest a quantitative ERRC analysis method by estimating requirements cost. Our method defines user requirements and decides their weight. Then, it makes quality level table for all the identified requirements and function modules and estimate implementation cost based on their quality levels. Finally, assess each requirement's impact and then evaluate ERRC value. We could get the more objective ERRC values by evaluate the requirement weight. functional module weight, and implementation cost. And we proved the efficiency of our model by a case study, smart student ID system.

• Journal of Information Technology Services
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• v.8 no.3
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• pp.51-65
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• 2009

National qualification system for SW engineering is intended to be mechanisms to assure the competence of SW professionals. Qualification system for SW engineering can be categorized as national qualification, nationally certified private qualification, and private qualifications. In this paper, we present a summary report of needs analysis for new national qualification systems, based on the survey from human resource department managers of IT companies in IT service, package SW and embedded SW industry. The survey results show that SW qualification system is appropriate for evaluation and career management, but does not provide up-to-date information concerning the technology assessment and change. Based on the result form needs analysis, we suggest the SW specialist and embedded SW specialist as new licenses in national qualification system. In addition, we also propose SW quality management engineer, systems management engineer, IT Protect management engineer, network management engineer and SW architect engineer, as new nationally certified private qualifications.

• Journal of Information Technology Services
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• v.6 no.1
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• pp.65-81
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• 2007

Recently, the affiliates of the Ministry of Information and Communication have been conducting a performance evaluation study on IT policy projects, based on the performance evaluation model of the U.S. Office of Management and Budgets, with regard to investment in computerization. The performance evaluation model for the policy project could provide the objective information required for the planning, development, and operation of the policy project. However, the performance of the most policy project is likely to be evaluated using the subjective evaluation criteria of evaluators. Therefore, this case study evaluates the relative efficiency using DEA (Data Envelopment Analysis) in order to improve the performance evaluation method of the digital pioneer' project implemented by the Korea IT Industry Promotion Agency. The improvement value of inefficient Decision Making Units (DMUs) was measured by a static efficiency analysis. The measured value will suggest a objective viewpoint of the performance between DMUs to evaluators. In doing so, it will show an appropriate direction for the policy project to be evaluated successfully.

• Journal of Information Technology Services
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• v.20 no.2
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• pp.33-55
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• 2021

Many agile practices have been suggested for software development flexible enough to adapt to a rapidly changing environment. However, too many agile practices hinder computer engineers from deciding which agile practices are suitable for a given project. They need guidelines of the benefits an agile practice provides for a project, and how many of its benefits are effective. Therefore, this study investigates IT experts' perspectives on each agile practice's effectiveness in their projects using a repertory grid technique. Based on an analysis of data collected from 23 Korean IT experts about 33 agile projects, we elicit 361 cognitive effects categorized into 30 benefits using content analysis. Next, we identify agile practices that are primarily used and recognized as positive and further examine what benefits many agile practices usually bring. Finally, we evaluate the level of benefits overall that each agile practice provides.

• The Korean Journal of Emergency Medical Services
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• v.27 no.1
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• pp.31-41
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• 2023

Purpose: This study was conducted to analyze variables related to paramedic students' major satisfaction comprehensively and present development plans to improve major satisfaction. Methods: Five studies were selected for analysis. The overall average effect size, effect sizes for each related variable, and publication bias were analyzed using Comprehensive Meta-Analysis (CMA) version 2.0 (Biostat, Englewood, NJ, USA). Results: Various known variables related to major satisfaction were found to have little correlation, and paramedic students' major satisfaction were highly correlated variables, such as major commitment (ES=.781), and department adaptation (ES=.722). Conclusion: Research should be continuously conducted to examine additional variables correlated with the major satisfaction of paramedic students.

• Journal of Platform Technology
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• v.12 no.4
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• pp.3-14
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• 2024

The big data logs generated from digital content consumption are crucial resources for companies to understand user behavior, provide personalized services, and optimize business strategies. This paper presents effective methods for collecting, storing, preprocessing, analyzing, and utilizing digital content consumption logs. Through these methods, digital content companies can improve user experience, enhance operational efficiency, and strengthen their competitiveness. This paper analyzes various case studies involving real-time monitoring and problem-solving using log data, personalized recommendation systems, and strategies to improve user experience. Specifically, it presents concrete methods for data-driven innovation through successful log data utilization strategies employed by companies such as Netflix, YouTube, Amazon, and Instagram. Future research should include the development of an integrated system architecture for big data log processing, encompassing data collection, storage, processing, analysis, and visualization. Such an integrated system design will enable companies to utilize log data more efficiently and respond quickly to rapidly changing market environments. The digital content industry will continue to evolve through the analysis and optimization of big data logs. By implementing the strategies presented in this paper, companies can achieve better user experiences and higher business performance.

• Journal of Information Technology Services
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• v.17 no.3
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• pp.171-189
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• 2018

To remove software defects and improve performance of software, many developers perform code inspections and use static analysis tools. A code inspection is an activity that is performed manually to detect software defects in the developed source. However, there is no clear criterion which source codes are inspected. A static analysis tool can automatically detect software defects by analyzing the source codes without running the source codes. However, it has disadvantage that analyzes only the codes in the functions without analyzing the relations among source functions. The functions in the source codes are interconnected and formed a social network. Functions that occupy critical locations in a network can be important enough to affect the overall quality. Whereas, a static analysis tool merely suggests which functions were called several times. In this study, the core functions will be elicited by using social network analysis and DEA (Data Envelopment Analysis) for CUBRID open database sources. In addition, we will suggest clear criteria for selecting the target sources for code inspection and will suggest ways to find core functions to minimize defects and improve performance.

• Korean Journal of Child Education & Care
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• v.18 no.2
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• pp.217-230
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• 2018

The purpose of this study is to investigate the consumer centered on-line services of Support Center for Childcare(SCC) of districts. For this purpose this study analyzed the 69 on-line services in websites of SCC. The materials used to evaluate the website services in this study were revised from Lee(2009)'s, Moon(2005)'s and Lee(2005)'s study. The evaluation categories are composed of information providing services, complaints handling services, online participation services, and usability services. The result of this study are as follows. First, in the aspect of information providing services, introduction to SCC, main business of SCC, and related website ranked high. Second, in the aspect of complaints handling services, complaint service board and complaint process notice ranked high. Third, in the aspect of online participation services, on-line application and reservation ranked high. Fourth, in the aspect of usability services, integrated searching, site map, and personal information protection ranked high. The results of this study showed that websites of SCC of districts tried to various services to communicate the consumers. Also the results of this study revealed the contents and problem of websites of SCC, and implied the more systematic and efficient services of SCC.

• The KIPS Transactions:PartD
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• v.18D no.6
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• pp.481-492
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• 2011

Recently, various mobile services are provided by the spread of wireless network infrastructures and smart devices. The improvement of cloud computing technologies increases the interests for enterprise mobile cloud services in various IT companies as well. By increasing the interests for enterprise mobile cloud services, it is necessary to evaluate the use of enterprise mobile cloud services. Therefore, the factors which affect the user acceptance of enterprise mobile cloud services are analyzed on the basis of Davis' technology acceptance model in this research. As analysis results, four external variables have significant effects on perceived ease of use of mobile cloud services. Also, these variables indirectly affect attitude toward using cloud services. The results show that the security is the most important factor for attitude toward using enterprise mobile cloud services. The service users also consider the interoperability as an important factor for the user acceptance of cloud services. The perceived ease of use has more contribution than the perceive usefulness on attitude toward using enterprise mobile cloud services. This research has both industrial and academic contributions because it provides the guideline to companies for introducing the enterprise mobile cloud services and apply the technology acceptance model on new IT services.