Fault Trees for Diagnosis of System Fault Conditions

Survey of systems safety analysis methods and their application to nuclear waste management systems

“…These latter events are termed primary events. As indicated by Lambert (1977), the tree becomes II • • • a Boolean logic model that depicts the parallel and sequential combinations of [primary] events that cause a top event to occur. II At the minimum the tree is a qualitative graphic model and can be used for displaying what has been considered in the assessment.…”

Variance-Importance of System Components

“…When we want to reduce the uncertainty of system unreliability, we need to V = E{(Q -Q)2} know for which component to collect failure data. In this paper, the variance-importance of system components is a7f 21 (1) various measures of reliability-importance [1,2] that have Sq1 Sq2 q been presented for quantifying component's contribution l* implies "evaluated" at the means of componentto the occurrence of system failure.…”

Zen and the Art of Railway Maintenance

“…Fault trees can be used in such situations to help identify the most likely causes of the failure, which helps speed up repairs [LY77]. This thesis does not discuss how to perform such diagnosis.…”