Contribution to an improvement of quantitative evaluation model for reliability of safety-related functions

被引:0
作者
Hamidi, K
Malasse, O
Aubry, JF
机构
来源
Proceedings of the IEEE-ISIE 2004, Vols 1 and 2 | 2004年
关键词
reliability; dependent errors; functional evaluation; common cause failures;
D O I
暂无
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper presents a more accurate modeling way of safety -related function and gives new opportunities towards a quantitative evaluation of safety and availability in complex fault-tolerant architectures. The necessity of guarantying the availability and safety property of a process by integrating a realistic description of the studied safety function is urgent due to the quick development of fault tolerant architectures supported by fault detection procedures. auto-test and maintenance policies. Our goal is to present a high-level evaluation model, which will take into account the possible consequences of architectural choices and allow us by comparison of well-recognized safety and availability metrics to choose the best architecture in regards of requirements on performances of our safety-related function. The presented high-level evaluation model is a probabilistic evaluation model based on heterogeneous class of interacting sub-models including Markov, chains and finite automata. The choice of the best architecture is based on a compromise between availability. safety and operative cost aspects.
引用
收藏
页码:115 / 120
页数:6
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