• KIPS Transactions on Software and Data Engineering
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• v.2 no.8
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• pp.527-534
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• 2013

The software is changed according to the changing businesses and the user requirement, it involves increasing complexity and cost. Considering the repetitive changes required for the software, replacement is more efficient than maintenance at some point. In this study, the replacement time was predicted using the service dissatisfaction index and replacement point assessment index by the software group for each task. First, fuzzy inference was used to develop the method and indicator for the user's service level dissatisfaction. Second, the replacement point assessment method was established considering the quality, costs, and new technology of the software. Third, a replacement time prediction technique that used the gap between the user service measurement and replacement point assessment values was proposed. The results of the case study with the business solutions of three organizations, which was conducted to verify the validity of the proposed prediction technique in this study, showed that the service dissatisfaction index decreased by approximately 16% and the replacement point assessment index increased by approximately 9%.

• Journal of the Korean Society for Railway
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• v.13 no.4
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• pp.412-418
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• 2010

This paper presents the methods to acquire the Safety Certificate from Independent Safety Assessment based on the IEC standard62279 which is commonly applied to railway system for Automatic Train Control(ATC) system in accordance with Urban Maglev project. This also shows approach methods and relative activities for project life- cycle to accomplish and ensure the system requirements of ATC system, RAMS and S/W quality activities. Furthermore, the key tasks conducted with ISA are noted in detail. These kind of activities for software quality of ATC system to obtain S afety Certificate could be a CASE model to improve the quality of domestic railway system and products, and also contribute to the growth of railway business and toward the achievement of overseas' railway signaling markets.

• Annual Conference of KIPS
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• 2002.04a
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• pp.505-508
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• 2002

소프트웨어를 기능 단위인 부품으로 분류하고 소프트웨어 부품을 조합하여 개발해 나가는 컴포넌트 기술은 개발비용의 감소와 소프트웨어 전체의 신뢰성 향상을 목적으로 주목되고 있다. 그러나 재사용의 대상이 되는 각 컴포넌트의 신뢰성이 낮고 오히려 전체의 신뢰성을 손상시키는 결과가 나타나고 있다. 결국, 컴포넌트의 신뢰성 향상이 매우 중요하고 이를 위해 컴포넌트에 대해 품질을 측정할 필요가 있다. 본 연구에서는 소스코드가 공개되지 않은 소프트웨어 컴포넌트에 대해 블랙박스의 개념으로 보고 정적 측면에 대한 품질을 측정하는 기법을 제안한다.

• Journal of the KSME
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• v.34 no.3
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• pp.177-184
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• 1994

이 글에서는 기하공차의 기본적인 개념들에 대한 설명과 삼차원측정기 응용소프트웨어에서 기하 공차를 평가하기 위한 수학적인 방법들에 대해 소개하였다. 최소영역법은 ISO규격에 의한 공차 평가법이란 점에서 근래의 연구의 대부분을 차지하고 있으나 표준적인 알고리즘이라 할 수 있는 방법은 아직 발표되지 않고 있으며 실용적인 소프트웨어의 경우 최소자승법을 근간으로 하고 있는 실정이다. 최근에는 이러한 형상추출과 기하공차평가를 포함하는 좌표식 측정기 술(coordinate metrology)이 컴퓨터통합생산(computer integrated manufacturing)시스템 구축에 있어서 아킬레스건이라 할 수 있는 컴퓨터원용검사(computer aided quality control)의 핵심적인 기술로 인식되어 선진국에서는 이미 표준기술을 확립하고자 하는 목적으로 체계적인 지원하에 연구를 수행하고 있다. 그러므로 국내에서도 품질보증에 의한 제조업 분야의 생산성 제고를 위 하여 좌표식 측정기술에 대한 연구와 투자가 시급하며 국내의 표준기술 확립이 절실히 요청되고 있다하겠다.

• Annual Conference of KIPS
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• 2012.11a
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• pp.1571-1574
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• 2012

소프트웨어 개발에 있어 각 단계별 프로세스 활동들에 대한 분석 및 평가는 소프트웨어의 품질을 좌우하는 큰 요인이다. 따라서 많은 소프트웨어 척도들이 소프트웨어 품질을 분석하는데 이용되고 있으며 유사 프로젝트를 통해 설정되는 기준치와 척도 값의 비교가 수행된다. 하지만 기존의 유사 프로젝트를 찾기란 쉽지 않은 일이며 유사 프로젝트를 찾더라도 해당 프로젝트의 개발 환경은 현재 개발 중인 프로젝트의 환경과 다른 경우가 많다. 따라서 본 논문에서는 외적인 기준치에 의존하지 않고 현재 개발 단계의 인스펙션 결과를 분석하는 방법을 제시하도록 한다. 산포도를 이용한 상대적 데이터 분석이 이용되며 국방 도메인에서 개발 중인 프로젝트 내부 31 개의 기능으로부터 수집된 데이터를 통한 사례분석을 수행하도록 한다. 이를 통해 기능들 간 현재 개발 과정의 일관성 유지 여부를 평가하고 다음 개발 단계의 프로세스 활동 강화 여부에 대한 권고 사항을 제시할 수 있다.

• Progress in Medical Physics
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• v.21 no.1
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• pp.113-119
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• 2010

Software for GafChromic EBT2 film dosimetry was developed in this study. The software provides film calibration functions based on color channels, which are categorized depending on the colors red, green, blue, and gray. Evaluations of the correction effects for light scattering of a flat-bed scanner and thickness differences of the active layer are available. Dosimetric results from EBT2 films can be compared with those from the treatment planning system ECLIPSE or the two-dimensional ionization chamber array MatriXX. Dose verification using EBT2 films is implemented by carrying out the following procedures: file import, noise filtering, background correction and active layer correction, dose calculation, and evaluation. The relative and absolute background corrections are selectively applied. The calibration results and fitting equation for the sensitometric curve are exported to files. After two different types of dose matrixes are aligned through the interpolation of spatial pixel spacing, interactive translation, and rotation, profiles and isodose curves are compared. In addition, the gamma index and gamma histogram are analyzed according to the determined criteria of distance-to-agreement and dose difference. The performance evaluations were achieved by dose verification in the $60^{\circ}$-enhanced dynamic wedged field and intensity-modulated (IM) beams for prostate cancer. All pass ratios for the two types of tests showed more than 99% in the evaluation, and a gamma histogram with 3 mm and 3% criteria was used. The software was developed for use in routine periodic quality assurance and complex IM beam verification. It can also be used as a dedicated radiochromic film software tool for analyzing dose distribution.

• Journal of the Korea Society for Simulation
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• v.24 no.4
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• pp.1-9
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• 2015

As the use of software is more wider in the safety-critical nuclear fields, so study to improve safety and quality of the software has been actively carried out for more than the past decade. In the nuclear power plant, nuclear man-machine interface systems (MMIS) performs the function of the brain and neural networks of human and consists of fully digitalized equipments. Therefore, errors in the software for nuclear MMIS may occur an abnormal operation of nuclear power plant, can result in economic loss due to the consequential trip of the nuclear power plant. Verification and validation (V&V) is a software-engineering discipline that helps to build quality into software, and the nuclear industry has been defined by laws and regulations to implement and adhere to a through verification and validation activities along the software lifecycle. V&V is a collection of analysis and testing activities across the full lifecycle and complements the efforts of other quality-engineering functions. This study propose a methodology based on V&V activities and related tool-chain to improve quality for software in the nuclear power plant. The optimized methodology consists of a document evaluation, requirement traceability, source code review, and software testing. The proposed methodology has been applied and approved to the real MMIS project for Shin-Hanul units 1&2.

• KIISE Transactions on Computing Practices
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• v.24 no.1
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• pp.46-52
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• 2018

Software metrics as a way to evaluate software play a significant role in reducing software development costs and improving quality. However, the emergence of various software metrics creates the problem that the user must select the correct metric. Various strategies have been studied to solve this problem. However, existing studies still have difficulties in selecting metrics by requiring high user interventions. Therefore, in this paper, we propose a method that helps to select the right metric and the metric tools by using their various characteristics as selection criteria, instead of using weighted expressions to minimize user intervention.

• The Transactions of the Korea Information Processing Society
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• v.2 no.2
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• pp.176-184
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• 1995

The software reuse is a prospective way to improve software productivity and quality but not applied very well in practice, because there is no quantitative metric for software quality. In this paper we proposed the quantification of the reuse of software that we can measure the possibility of the reuse by applying the reuse assessment metric to the module after the extraction of a module from existing software. For measuring the module that can be reused, we divided the factors of quality by the generality, simplicity, maintainability and modularity, and identified and measured the module by the factors and finally decided the possibility of the software reuse. The advantage of the proposed metric is that we can find the inappropriate reuse of module exactly at the beginning by measuring quantitatively the module to be reused.

• Proceedings of the Korea Association of Information Systems Conference
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• 2005.05a
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• pp.258-265
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• 2005

유비쿼터스 사회의 도래로 모바일 비즈니스 서비스 수요의 증대와 다양한 사용자 요구사항 및 변경이 빈번해짐에 따라 소프트웨어의 특성을 적시에 반영할 수 있는 새로운 소프트웨어 개발 기술이 필수적이다. 소프트웨어 프로덕트 라인은 공통의 유사한 기능을 가지고 있는 소프트웨어 제품 혹은 소프트웨어 시스템 집합으로 특정 영역의 시장과 용도의 요구사항에 따라 재사용 가능한 아키텍처 및 컴포넌트를 구성함으로써 생산성과 품질을 향상시킬 수 있다. 특히, 시스템을 분할하고 구조화하여 시스템의 성능과 효율성을 향상시킬 수 있는 소프트웨어 아키텍처 개념이 중요시 되면서 아키텍처의 개발과 평가에 대한 체계적인 연구가 필요하다. 본 논문에서는 CBD (Component Based Development)를 기반한 소프트웨어 프로덕트 라인(PLD: Product Line based Development)을 도입하여 모바일 비즈니스 도메인에 적합한 모바일 응용 시스템 아키텍처(MASA: Mobile Application System Architecture)를 제시한다.