The Aim of the paper is to analyse definitions term “common cause failures” given in various international and Russian standards point out their shortcomings; identify typical errors use this notion consideration such failures as part system dependability calculation. importance topic due fact that reduce efficiency redundancy must be taken into account process design systems with high requirem...

A common cause failure occurs when several failures have the same origin. Common cause failures are either common event failures, where the cause is a single external event, or common mode failures, where two systems fail in the same way for the same reason. Common mode failures can occur at different times because of a design defect or a repeated external event. Common event failures reduce th...

Abstract The reliability and safety of any system is the most important qualitative characteristic of a system. This qualitative characteristic is of particular importance in systems whose functions are under various stresses, such as high temperature, high speed, high pressure, etc. A considerable point, which is rarely taken into account when calculating the reliability and safety of syst...

ANSI/ISA S84.01-1996 and drafts IEC 61508/61511 are standards covering the design, operation, maintenance, and testing of safety instrumented systems (SIS). The standards stress the importance of minimizing potential faults in the SIS through good design and engineering practice. These faults include random hardware, systematic, and common cause faults. Common cause faults occur when a single f...

This paper presents nonparametric predictive inference for system reliability following common-cause failures of components. It is assumed that a single failure event may lead to simultaneous failure of multiple components. Data consist of frequencies of such events involving particular numbers of components. These data are used to predict the number of components that will fail at the next fai...

When we apply safety analysis techniques on a new design, our primary objective is to anticipate potential scenarios of failure in the system under examination. If we assume that the system has a complex hierarchical structure, this task can be interpreted as one of identifying how failures originate at the low-levels of the design and how combinations or sequences of such low-level failures pr...