Explicit and implicit Bayesian Network-based methods for the risk assessment of systems subject to probabilistic common-cause failures

2020 ◽  
Vol 123 ◽  
pp. 103319
Author(s):  
Siqi Qiu ◽  
Xinguo Ming
Keyword(s):  
Risk Assessment ◽  
Bayesian Network ◽  
Common Cause ◽  
Common Cause Failures

scholarly journals Safety of Machinery – Determination of Performance Level / Bezpieczeństwo Maszyn – Wyznaczanie Poziomu Zapewnienia Bezpieczeństwa

2013 ◽  
Vol 25 (1) ◽  
pp. 75-84
Author(s):  
Leszek Kasprzyczak
Keyword(s):  
Risk Assessment ◽  
Risk Reduction ◽  
Performance Level ◽  
Common Cause ◽  
Safety Function ◽  
Common Cause Failures ◽  
Mean Time

Abstract The article presents a method for determining the performance level (PL) on the basis of the PN-EN ISO 13849-1 standard, which is harmonized with the machinery directive 2006/42/EC. The risk assessment and risk reduction criteria, according to PN-EN ISO 12100, were briefly characterized. The focus was put on determining the required performance level PLr on the basis of a risk graph. The method was presented how to use a safety function composed of input-, logicaland execution subsystems. It was demonstrated how to determine the achieved PL for a safety function composed of hardware elements on the basis of a safety category, mean time to dangerous failures (MTTFd), diagnostic coverage (DC), and immunity to common cause failures (CCF).

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