• Title/Summary/Keyword: S/W Safety Assessment

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Implementation of Automatic Tool for S/W Change Impact Analysis in Railway System (철도시스템 소프트웨어 변경영향 분석을 위한 자동화 도구 개발)

  • Jo, Hyun-Jeong;Hwang, Jong-Gyu;Kim, Yong-Kyu
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.58 no.2
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    • pp.95-100
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    • 2009
  • Recent advances in computer technology have brought more dependence on software to railway systems. Hence, the safety assurance of the vital software running on the railway system is very critical task and yet, not many works have been done. While much efforts have been reported to improve electronic hardware's safety, not so much systematic approaches to evaluate software's safety. In this paper, we suggested an automated analysis tool for S/W change impact in railway system, and presented its result of implementation. The analysis items in the implemented tool had referred to the international standards in relation to the software for railway system, such as IEC 61508 and IEC 62279. In these international standards, 'change impact analysis' for railway system S/W has to be required mandatorily. The proposed tool can be utilized at the assessment stage and also the software development stage.

Study on Procedure & Management for Railway Signaling S/W Safety Assessment (열차제어 S/W 안전성 평가를 위한 절차 및 관리 방안 연구)

  • Jo, Hyun-Jeong;Hwang, Jong-Gyu;Kim, Yong-Kyu
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.1237-1242
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    • 2008
  • Recent advances in computer technology have brought more dependence on software to train control systems. Hence, the safety assurance of the vital software running on the railway system is very critical task and yet, not many works have been done. While much efforts have been reported to improve the safety of electronic hardware, not so much systematic approaches to evaluate the safety of software, especially for the vital software running on board train controllers. In this paper, we propose the guide line of actually applicable software safety assessment in train control systems. And we demonstrate the results of developing a new tool based on web system version for software assessment management.

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Development of Automatic Tool for Software Metrics Analysis for Railway Signaling System (열차제어시스템 소프트웨어 Metrics 분석 자동화 도구 개발)

  • Hwang, Jong-Gyu;Jo, Hyun-Jeong;Kim, Yong-Kyu
    • Journal of the Korean Society for Railway
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    • v.12 no.4
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    • pp.450-456
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    • 2009
  • In accordance with the development of recent computer technology, the dependency of railway signaling system on the computer software is being increased further, and accordingly, the testing for the safety and reliability of railway signaling system software became more important This thesis suggested automated an analysis tool for S/W metrics on this railway signaling system, and presented its result of implementation. The analysis items in the implemented tool had referred to the international standards in relation to the software for railway system, such as IEC61508 and IEC 62279. This automated analysis tool for railway signaling system can be utilized at the assessment stage for railway signaling system software also, and it is anticipated that it can be utilized usefully at the software development stage also.

The Method of Change Impact Analysis for Railway Signaling S/W (열차제어 S/W 변경영향 분석을 위한 방법 연구)

  • Jo, Hyun-Jeong;Hwang, Jong-Gyu
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.2044-2049
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    • 2009
  • Recent advances in computer technology have brought more dependence on software to railway signaling systems. Hence, the safety assurance of the vital software running on the railway signaling system is very critical task and yet, not many works have been done. While much efforts have been reported to improve electronic hardware's safety, not so much systematic approaches to evaluate software's safety. In this paper, we suggested an automated analysis tool for S/W change impact in railway signaling system, and presented its result of implementation. The analysis items in the implemented tool had referred to the international standards in relation to the software for railway signaling system, such as IEC 61508 and IEC 62279. In these international standards, 'change impact analysis' for railway signaling system S/W has to be required mandatorily. The proposed tool can be utilized at the assessment stage and also the software development stage.

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Quantitative Safety Assessment for Hydrogen Station (수소 충전소에 대한 정량적 안전성 평가)

  • Seong, D.H.;Rhie, K.W.;Kim, T.H.;Oh, D.S.;Oh, Y.D.;Seo, D.H.;Kim, Y.G.;Kim, E.J.
    • Journal of the Korean Society of Safety
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    • v.27 no.3
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    • pp.111-116
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    • 2012
  • This study is about the quantitative safety assessment of hydrogen station in Korea operating with on-site type. This was written by background information that before qualitative safety assessment to write. For the qualitative safety assessment method, the study used FMEA(failure mode & effect analysis) and HAZOP(hazard & operability), and adopted the FTA(fault tree analysis) as the quantitative safety assessment method. To write the FTA, we wrote FT by Top event that hydrogen leakage can be called most serious accident of hydrogen station. Each base event collect reliability data by reliability data handbook, THERP-HRA and estimation of the engineering. Assessment looked at the high frequency and the possible risk through Gate, Importance, m.cutsets analysis.

A Study on the Risk Assessment Criteria to be applicable for Establishing Flight Procedure Design Process (비행절차설계과정에서 적용 가능한 위험평가기준 연구)

  • Kim, Dohyun;Kim, W.Y.;Jie, M.S.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.21 no.1
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    • pp.51-56
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    • 2013
  • Risk assessment should be processed when physical circumstances of airspace such as establishment of new flight procedures or reconstruction of existing airspace are planned to change and one of the alternatives for the change have to be selected. This is an effort to find the best alternative which is able to maintain at or above the acceptable risk level. ICAO and its contracting states provide specialized guidance material for 'Safety Management System' relating to handing airspace matters. These manuals include a conceptual framework for managing safety as well as some of the systemic processes and criteria used to meet the objectives of a State's safety programme. This criteria must be established in compliance with the State's laws and regulations for air safety and for the fulfillment of the State's safety goals. This study is to carry out the risk assessment criteria through literature reviews relevant to the safety management, and to propose the results of criteria to be applicable for establishing flight procedure design process.

Network-based Simulation System Framework for the Safety Assessment of Ship (선박의 안전성 평가를 위한 네트워크 기반의 시뮬레이션 시스템 프레임워크)

  • Lee K.-H.;Kim H.-S.;Han S.-W.;Park J.-H;Oh J.
    • Korean Journal of Computational Design and Engineering
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    • v.10 no.5
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    • pp.356-364
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    • 2005
  • As a ritual of modern people is getting higher, the safety assessment of the structure related to people has become the most important part in the process of the design. Especially, in the case of a ship, as regulations about the safety of passengers and the pollution in the ocean are strictly reinforcing, the safety assessment has become the most important part in the process of the design. However, because the established safety assessment is mostly depend on the experienced theory, it is so difficult to assess the safety considering a lot of situations such as various ocean environments, the mistake of sailors and emergency situations. As the way to solve this problem, lately the study of the simulation using a computer has been processed. In this paper, we suggested network-based simulation system framework using HLA (High Level Architecture) among many kind of simulations to assess the safety of the ship. Because HLA has already become a standard of the future simulation system in the U.S. DoD(Department of Defense) and Korea army, we expect to raise the possibility in the future. In addition, because HLA makes a standard of documents and a reused component(Federate) of simulation(Federation) by OMT(Object Model Template) and RTI(Runtime Infrastructure), we expect that this study will be developing the safety assessment of ship as well as operation in warship and cooperation with another applications.

A Study of Safety Life-cycle for Integrated Centralized Traffic Control(CTC) (통합사령실의 소프트웨어 개발에서 안전성 라이프사이클 개선에 대한 연구)

  • Ohn, Jung-Ghun;Lee, Jong-Woo
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.959-963
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    • 2007
  • After the year of 2000, the need of safety increases in field of railroad. The project for developing Integrated Centralized Traffic Control(CTC) center started at 2002 to control the full domestic railroad network. A traffic control software was required the safety activity and assessment, according to 'KORAIL Instruction number 2001-49'. There were many trials and errors to perform safety activity because the technology and recognition of safety activity is in primary stage. However the safety activities are gradually stabilized. This paper describes the safety life-cycle and development life-cycle of Integrated CTC S/W and a suitable life-cycle of safety to develop S/W of Integrated CTC.

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