China
Africa
Explore chapters and articles related to this topic
General introduction
Published in Adedeji B. Badiru, Handbook of Industrial and Systems Engineering, 2013
A significant advantage in working with reliability, rather than directly with human performance, is the ability to avail ourselves of basic system models. A system's functional and physical decomposition can be used to construct a system-level reliability block diagram, the structure of which is used to compute reliability in terms of component and subsystem reliabilities. In the I-SPY case, we considered the reliability block diagram shown in Figure 11.11. This diagram was derived, with some adaptation, from a front-end analysis of the workflow of an Air Force Predator pilot (Nagy et al., 2006). It was simplified such that the functions depicted could be reasonably matched with those tasks assessed by Schreiber and colleagues
Basic Methods for RAM Analysis and Decision Making
Published in Qamar Mahboob, Enrico Zio, Handbook of RAMS in Railway Systems, 2018
Andreas Joanni, Qamar Mahboob, Enrico Zio
A reliability block diagram (RBD) is an effective means to visually represent and quantitatively assess the behavior of a system with regard to functioning or failure and, thus, may help decide upon possible improvement measures in the system logic configuration. An RBD shows the logical connection of (functioning) components needed for successful operation of the system, which essentially makes it a graphical representation of Boolean expressions linking the success state (up state) of a system (i.e., the overall RBD) to the success states (up states) of its components.
System Reliability Analysis
Published in Mohammad Modarres, Mark P. Kaminskiy, Vasiliy Krivtsov, Reliability Engineering and Risk Analysis, 2016
Mohammad Modarres, Mark P. Kaminskiy, Vasiliy Krivtsov
A reliability block diagram is a series configuration in which the failure of any one item (according to the failure mode of each item, based on which the reliability block diagram is developed) results in the failure of the system. Accordingly, for the functional success of a series system, all of its blocks (items) must successfully function during the intended mission time of the system. Figure 4.1 shows the reliability block diagram of a series system consisting of N blocks.
Reliability Evaluation of Cyber-Physical Power Systems Considering Random Failures in Measurement and Remote Control
Published in Electric Power Components and Systems, 2021
Yuan Zhao, Chaojie Yang, Yunhe Sun, He Ren, Xueyuan Cheng, Kaigui Xie
The control center plays a pivotal role in the system monitoring and control. When the operational constraints of the physical power system are violated due to the random faults of electrical devices, if the dispatching automation system also fails due to some key device failures in the control center, it may cause a long time of electricity interruption or even cascading failures. Therefore, a dual configuration for the communication controller and server is usually adopted to maintain higher reliability. The reliability of the control center can be analyzed by the reliability block diagram (RBD), where the components that are used together to perform a function are put in series and the redundant components are put in parallel.