Reliability evaluation of a port oil transportation system in variable operation conditions

An Evaluation of the Operation of the Railway E-Ticketing System

“…The operator cannot handle a hardware failure and it has to be repaired by the maintenance department. The main manifestation of software errors is computer operating system instability or crashes caused by running computer, which can all be almost resolved by restarting the terminals .Therefore reliability is used to measure the hardware failure rate (ratio of times of hardware failure per month and the number of terminals) [7].…”

Reliability and risk evaluation of a port oil pipeline transportation system in variable operation conditions

“…The preliminary results related to reliability evaluation of the considered in this paper a port oil transportation system in variable operation conditions were presented in [6]. In this paper there are presented the improved general results and their more precise applications to reliability and risk analysis and evaluation of this oil pipeline system.…”

“…The assumption that the systems are composed of multi-state components with reliability state degrading in time without repair [3] gives the possibility for more precise analysis of their reliability, safety and operational processes' effectiveness. This assumption allows us to distinguish a system reliability critical state [3,[6][7][8] to exceed which is either dangerous for the environment or does not assure the necessary level of its operational process effectiveness. Then, an important system reliability characteristic is the time to the moment of exceeding the system reliability critical state and its distribution, which is called the system risk function.…”

“…The complexity of the systems' operation processes and these processes influence on changing in time the systems' structures and their components' reliability characteristics [6][7][8] is often very difficult to fix and to analyse. A convenient tool for solving this problem is semi-Markov [2] modelling of the systems operation processes which is proposed in the paper.…”

“…A convenient tool for solving this problem is semi-Markov [2] modelling of the systems operation processes which is proposed in the paper. Using the joint model of the system multi-state reliability and the system semi-Markov operation process [6][7][8] it is possible to point out the variability of system components reliability characteristics by introducing the components' conditional multi-state reliability functions determined by the system operation states.…”