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System safety is analyzed from inherent network topology structure of integrated complex system. This paper discusses the influences of system inherent topology structure and the statistical property on fault propagation. Fault propagation model is established and the fault propagation intensity is defined as the weight of the edge among nodes considering the network statistical information. The highest...
Fault propagation identification is an indispensable task in complex system safety analysis. With the growing of system scale and complexity, it is hard for the traditional safety analysis techniques, which depend mainly on analysts' personal skills and experiences, to keep completeness and timeliness; moreover, some failure modes may be neglected and failure effects misjudged during the analysis...
We present a discussion of the issues involved with eliciting and managing safety requirements in complex systems. We show how safety case architectures present a modular view of a safety case which is consistent with the modular structure of a system of systems. These architectures can also be used to allocate responsibility for safety analysis across contractual boundaries. This paper discusses...
The evaluation of the dependability performance (RAMS) of complex embedded systems requires the development of new approaches. In software-intensive systems, the dependability structure of the functions depends on the software. The search of fault sequences must involve software and hardware. The proposed method contributes to the qualitative and quantitative safety analysis of systems and micro-systems.
The safety of the complex systems depends not only on all failed states of system components, but also on the sequence of occurrences of those failures. Classical methods in sequential failure analysis always starts with given sequences of the failures in the system, so the sequences of the failures should be identified and the probability of their occurrences should be determined. The method used...
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