• Journal of Electrical Engineering and Technology
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• 제2권3호
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• pp.386-390
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• 2007

At recent times, an essential issue in the replacement of the old analogue I&C to computer-based digital systems in nuclear power plants becomes the quantitative software reliability assessment. Software reliability models have been successfully applied to many industrial applications, but have the unfortunate drawback of requiring data from which one can formulate a model. Software that is developed for safety critical applications is frequently unable to produce such data for at least two reasons. First, the software is frequently one-of-a-kind, and second, it rarely fails. Safety critical software is normally expected to pass every unit test producing precious little failure data. The basic premise of the rare events approach is that well-tested software does not fail under normal routine and input signals, which means that failures must be triggered by unusual input data and computer states. The failure data found under the reasonable testing cases and testing time for these conditions should be considered for the quantitative reliability assessment. We presented the quantitative reliability assessment methodology of safety critical software for rare failure cases in this paper.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.272-279
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• 2007

Recently, train control system is adopting computer system replacing mechanical system and its software is taking more responsibility than ever. Train control system software is a safety-critical embedded software with realtime and high reliability requirements. In this paper, we propose a safety assessment method for the train control system software. We review characteristics of train control system software and analyze related international software safety standards to derive requirements for safety assessment. Testing tools used for embedded software are surveyed to find a feasible safety assessment architecture. The proposed safety assessment method is to use safety activity results generated during development processes and feed them to the runtime embedded software testing tool.

• 창의정보문화연구
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• 제6권2호
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• pp.101-106
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• 2020

미래교육을 준비하면서 소프트웨어 교육은 그 필요성이 점점 증대되고 있다. 소프트웨어 교육에서 운영의 내용과 더불어 평가 부분도 중요한 영역으로 대두되고 있다. 이에 본 연구에서는 문헌 연구를 통해 소프트웨어 교육에서 학습자 주도 평가의 효과성을 살펴보고, 이것이 교육 현장에 시사하는 점에 대해 고찰해 보고자 하였다. 초등학생 대상으로 학습자 주도 평가 모형을 적용한 소프트웨어 교육을 실시한 연구에 따르면 학습자 주도 평가는 학생들의 창의력, 문제해결력, 정보 활용력 등의 향상에 유의미한 효과를 보였으며, 소프트웨어 교육에 대한 흥미 또한 높아지게 하였다. 앞으로 관련 연구를 통해 학교 현장이 학생주도의 소프트웨어 교육을 통해 미래교육을 준비해 나가는 데 도움이 될 수 있기를 기대한다.

• 유통과학연구
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• 제13권1호
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• pp.57-70
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• 2015

Purpose - Open source software has high utilization in most of the server market. The utilization of open source software is a global trend. Particularly, Internet infrastructure and platform software open source software development has increased rapidly. Since 2003, the Korean government has published open source software promotion policies and a supply promotion policy. The dynamism of the open source software market, the lack of relevant expertise, and the market transformation due to reasons such as changes in the relevant technology occur slowly in relation to adoption. Therefore, this study proposes an assessment model of services provided in an open source software service company. In this study, the service level of open source software companies is classified into an enterprise-level assessment area, the service level assessment area, and service area. The assessment model is developed from an on-site driven evaluation index and proposed evaluation framework; the evaluation procedures and evaluation methods are used to achieve the research objective, involving an impartial evaluation model implemented after pilot testing and validation. Research Design, data, and methodology - This study adopted an iteration development model to accommodate various requirements, and presented and validated the assessment model to address the situation of the open source software service company. Phase 1 - Theoretical background and literature review Phase 2 - Research on an evaluation index based on the open source software service company Phase 3 - Index improvement through expert validation Phase 4 - Finalizing an evaluation model reflecting additional requirements Based on the open source software adoption case study and latest technology trends, we developed an open source software service concept definition and classification of public service activities for open source software service companies. We also presented open source software service company service level measures by developing a service level factor analysis assessment. The Behavior-Structure-Evolution Evaluation Model (BSEM) proposed in this study consisted of a rating methodology for calculating the level that can be granted through the assessment and evaluation of an enterprise-level data model. An open source software service company's service comprises the service area and service domain, while the technology acceptance model comprises the service area, technical domain, technical sub-domain, and open source software name. Finally, the evaluation index comprises the evaluation group, category, and items. Results - Utilization of an open source software service level evaluation model For the development of an open source software service level evaluation model, common service providers need to standardize the quality of the service, so that surveys and expert workshops performed in open source software service companies can establish the evaluation criteria according to their qualitative differences. Conclusion - Based on this evaluation model's systematic evaluation process and monitoring, an open source software service adoption company can acquire reliable information for open source software adoption. Inducing the growth of open source software service companies will facilitate the development of the open source software industry.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2007년도 춘계학술대회
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• pp.437-448
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• 2007

This paper introduce information technology of software process assessment. It consists of eight parts such as concepts and introductory guide, a reference model for processes and process capability, performing an assessment, guide to performing assessments, an assessment model and indicator guidance, guide to competency of assessors, guide for use in process improvement, and guide for use in determining supplier process capability.

• 한국멀티미디어학회논문지
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• 제11권6호
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• pp.891-902
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• 2008

The software once developed enters in to the $2^{nd}$ phase of its useful operational life, where it performs its functions for which it has been developed. This is an important phase of software life, wherein the developers and users have to assess the performance of the software to prolong its operational life with efficiency, effectiveness and economy. Performance of the software is based on the measurement of the quality characteristics to ascertain that it is meeting or exceeding the needs of customers in terms of its functionality, usability, efficiency, reliability, availability, maintainability, portability etc. These software quality attributes defined under ISO 9126 provide an overall good framework for assessing the performance of the software. This paper describes a Software Performance Assessment (SPA) model using the Goal-Question-Metric (GQM) paradigm which has been applied to the operational software in real context with successful results.

• 한국정보시스템학회지:정보시스템연구
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• 제20권2호
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• pp.1-20
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• 2011

In this study, we verify the relationship, which is presented by ISO/IEC 15504, between the assessor's competence and the efficiency of assessment. The ISO standard has been developed by many formal trial experiences for the software process assessment. The software process assessment determines the process capability, and makes the software process improvement possible in the development cycle. In the field assessment, third-party and team-based assessments are generally recommended. Therefore assessors' competences are essential to achieve the effectiveness and the efficiency of assessment. Survey data are collected from the third-party process assessment of a real IT industry, and the analysis is done by a causal modelling technique - PLS. Some findings are as follows. Depending on assessors' SE experiences, effects of the assessor's competence are existed, and their standard knowledge and assessment skill are effected each other. And the efficiency of assessment depends on the assessor's competence. In addition, the power analysis is presented and future research is suggested, because of many limitations of this study.

• 설비공학논문집
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• 제29권6호
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• pp.306-315
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• 2017

This study introduces a software for real-time assessment of combustion stability for utility gas turbines. The software was written with LabView, and implemented the time-domain kurtosis as a parameter to proactively access the instantaneous combustion stability during operation of the industrial gas turbine. The simple time-domain assessment algorithm incorporated in the software is advantageous over conventional frequency-domain signal processing of dynamic pressure signal since it reduces the computational cost, thereby making the algorithm more appropriate for real-time monitoring of combustion stability. Benchmark data obtained from a model gas turbine combustor were used for the reproducibility test of the software. The assessment obtained from the software agreed well with previously published results, indicating that incorporation of the software could enhance the performance of systems monitoring the combustion stability for gas turbines during power generation.

• 조명전기설비학회논문지
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• 제29권7호
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• pp.71-79
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• 2015

This paper is on the development of computer software which can be utilized as a power system analysis tool for reliability assessment education. The input data of the developed software are so simple that even a non-expert easily understand how to use it. The software provides not only reliability indices but also their distributions, moreover, it provides the factors those effect the indices, which made the software even more useful for educational purpose. The developed software utilized Monte-carlo simulation based on the state duration sampling, therefore it can manage various probability distributions such as exponential, Weibull, gamma and lognormal distribution. Within the software, the parameters of the distribution can be decided automatically from its mean and variance, that is another advantage as an educational software.

• 산학경영연구
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• 제13권
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• pp.179-193
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• 2000

소프트웨어 개발 프로세스의 품질관리 문제는 일반 제조상품과 달리 개발 공정과정과 제품자체의 복잡성 등으로 단순하지만은 않다. 최근 이러한 소프트웨어 프로세스 품질개선, 능력결정과 개발을 위한 국제 표준 ISO/IEC 15504가 완성되어 국내에도 적용되고 있으며, 이 결과는 국제적인 사례적용 보고서로 제출되어 등록되고 있다. 표준에 의한 소프트웨어 프로세스 심사의 기본은 해당 기본 프랙티스들의 수행여부와 수준을 확인함으로서 시작된다. 그리고 심사책임 및 신뢰성과 관련해서는 일반적으로 팀 단위로 구성된 심사원들이 프로세스 심사를 수행한다. 따라서 심사 팀의 구성과 프랙티스들의 중요도 선호가 프로세스 심사결과의 신뢰성과 객관성에 미치는 영향은 매우 크다. 본 연구에서는 실제 심사사례를 통해 나타난 해당 프로세스에 대한 기분 프팩티스들의 중요도와 심사결과를 비교해 소프트웨어 프로세스 심사사례를 분석한다. 연구 자료로는 ISO/IEC 15504 표준을 적용한 SPICE 실제 심사사례에 참여한 심사원 및 인터유 대상자들을 중심으로 수집한 설문자료를 이용하고, 이를 통계적 인자분석 방법을 통하여 결과를 도출한다. 향후 본 연구의 결과는 객관적이고 합리적인 심사 팀 구성을 위한 판단기준과 프랙티스 중요도 선호에 관한 정보를 제공함으로서 소프트웨어 프로세스 심사의 신뢰성과 효과성 향상에 기여할 수 있을 것이다.