On the Improvement of the Design Verification Process for the Development of Railway Systems with Systems Safety Considered
31 Mar 2013-Vol. 15, Iss: 1, pp 51-60
TL;DR: In this article, a special attention is given to the verification phase process, which is one of the intermediate phases of whole systems development process and the ultimate concern is placed on how to carry out the design verification while ensuring the safety requirements.
Abstract: As the human demand or desire on brand new systems otherwise equipped with new functions grows drastically, so does the complexity of the systems. With this trend, the systems are becoming bigger in scale and at the same time the safety requirements are more stringent in the development. Typical systems examples in such a situation may include high-speed railway systems, aero and space systems, marine systems, etc. Failure of those systems can cause serious damages on both the human being and wealth with social infrastructure. As such, it is quite necessary to ensure that the safety requirements be satisfied in the system development. To achieve this need, there could be a lot of solutions to take. In this paper, regarding safety, a special attention is given to the verification phase process, which is one of the intermediate phases of whole systems development process. More specifically, the ultimate concern is placed on how to carry out the design verification while ensuring the safety requirements. To do so, some improvements in the verification phase were proposed first. Then, the outcomes were combined with the systems safety process by generating an integrated process model to reach the goal. As a case study, application to a railway system was discussed, where strict safety requirements are usually necessary. It would be expected that the potential likelihood of failure with rail systems could be reduced if the results obtained are used effectively with some enhancement from further study.
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TL;DR: An integrated process in which core standards are re-configured from the developer’s point of view and described as an ontology enables the systematic and effective development of medical software.
Abstract: International standards for medical software require systematic development, with the core standards being IEC 60601-1, IEC 62034, and ISO 14971. Three core standards represent five development activities by referring activities undertaken as per other standards. As a result, developers have difficulty identifying the reference relationships. There are studies supporting the reference associations,
but they do not provide the associations at each stage of the development. So, we propose an integrated process in which core standards are re-configured from the developer’s point of view and describe as an ontology. By analyzing associations oriented development process, the integrated process is defined corresponding to requirements at each stage of the development procedure. Also, we define the cost required to comply with the standards. By randomly generated scenarios, a cost reduction of 47% can be achieved by suggested process. As a result, the integrated process enables the systematic and effective development of medical software.
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References
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TL;DR: Conventional and new techniques fully integrated into Model-Based Design have the potential for greater returns, and will be presented in this paper.
3 citations
"On the Improvement of the Design Ve..." refers background in this paper
...다만 특정 대상 시스템에 따라 안전성 평가 활동 및 수치적 표현에 있어 어려움 을 겪을 수 있기 때문에 대상 시스템에 맞게 프로세스 를 수정하여 적용해야 할 필요가 있다[6]....
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...[6] Chris Hayhurst, Brett Murphy, Richard Anderson, Coourous Mohtadi, Jon Friedman, and Pieter Mosterman, "Verification and Validation Integrated within Processes Using Model-Based Design," in Proc....
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Journal Article•
TL;DR: In this paper, the authors proposed an integrated SE process for the development of railway systems with safety assessment included, which enables both the SE process and safety assessment process to cooperate with each other from early development phase throughout the whole system life cycle.
Abstract: This paper proposes an integrated SE process for the development of railway systems with safety assessment included. Although the safety assessment process must be performed with SE process properly with good coordination, the interfaces between the two processes have not been clear. Thus, in many of safety critical system developments in Korea, it is difficult to assess safety in proper development phase. The process model proposed in this paper is based on both the concept of system life cycle and the repetitive use of SE process. In each of development phases, appropriate safety assessment methods are described. Also the evaluation of the integrated system incorporating safety factors is described. The resultant process model is expressed by the Enhanced Functional Flow Block Diagram (EFFBD) using a CASE tool. The model also allows timeline analysis for identifying activity flow and data flow, resulting in the effective management of process. In conclusion, the integrated process enable both the SE process and safety assessment process to cooperate with each other from early development phase throughout the whole system life cycle.
2 citations
Additional excerpts
...이러한 안전성 평가 방법을 시스템공학, 시스템안전 분석, 그리고 인간 요소를 기 반으로 한 통합 시스템 설계 방법을 개발한 연구가 있 었으나, 기능 중심의 위험원 분석 활동에 주로 초점이 맞춰져 있다[3]....
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...특히 철도시스 템의 경우 시스템의 안전성을 확보하기 위한 시스템공 학 프로세스를 통한 체계적인 프로세스가 필요할 뿐만 아니라 이를 기반으로 시스템의 수명주기 단계마다 안 전성을 평가해야 한다[3]....
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...다만 기존의 시스템안 전 프로세스 관련 연구에서는 전반적인 안전 활동 관 리나 초기 단계의 요구사항 수집에 대한 부분이 주로 체계적으로 다루어졌다[3]....
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...[3] J....
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