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Reliability analysis of mining systems
Published in Amit Kumar Gorai, Snehamoy Chatterjee, Optimization Techniques and their Applications to Mine Systems, 2023
Amit Kumar Gorai, Snehamoy Chatterjee
The improvement of system reliability can be made by following two approaches: Fault avoidance: The fault in the system can be avoided or minimized by using highly reliable components.Fault tolerance: This approach, known as the redundancy approach, tolerates the fault with the use of redundant components in the system. The drawbacks of the redundancy approach are increased design complexity of the system along with the costs, weight, and space requirement. In general, the approach is relatively expensive than the fault avoidance approach.
Product Manufacturing Degradation Control
Published in Douglas Brauer, John Cesarone, Total Manufacturing Assurance, 2022
Redundancy DisadvantagesIncreases item weight, complexity, cost, etc.Decreases unscheduled maintenance reliabilityIncreases maintenance costs
Protecting Computer Data
Published in Michael F. Hordeski, Emergency and Backup Power Sources:, 2020
Redundancy increases reliability. The extra resources in reserve is measured in N+ levels. If the number of generators is (N) that is required, another generator available for backup provides (N+1) levels. Two available generators gives N+2 levels and 2N provides twice as many as needed.
Analysis of Two Non-Identical Unit Cold Standby System in Presence of Prior Information
Published in American Journal of Mathematical and Management Sciences, 2021
Pramendra Singh Pundir, Rohit Patawa, Puneet Kumar Gupta
Traditionally, in reliability theory, system as well as its components are allowed to take only two possible states, either working or failed but multi-state system model allows experiencing some more intermediate states, like partially working or partially failed states. In today’s technological world, nearly everyone highly depends upon the continued functioning of a wide array of complex machinery and equipments, and when they fail, the results can be catastrophic. Hence, introducing redundancy efficiently is a very common approach to improve the reliability and availability of a system. Even then, whenever the loss due to failure is very high, redundancy may be an attractive option especially the cold standby redundancy i.e. improving reliability and mitigating risks by preparing an idle backup for infrastructure, facilities, systems and components.
A network science-based assessment methodology for robust modular system architectures during early conceptual design
Published in Journal of Engineering Design, 2020
Giota Paparistodimou, Alex Duffy, Robert Ian Whitfield, Philip Knight, Malcolm Robb
Redundancy is a well-established approach to improve the robustness of engineering systems. ISO 24765 (2010) defined redundancy as: ‘the presence of auxiliary components in a system to perform the same or similar functions as other elements for the purpose of preventing or recovering from failures’. Redundancy is also defined as the presence of ‘independent alternative paths between source and demand nodes which can be used to satisfy supply requirements during disruption or failure of the main paths’ (Goulter 1987; Yazdani and Jeffrey 2012). ISO 24765 (2010) defines redundancy in relation to auxiliary components that are included whereas Goulter (1987) relates to additional connectivity between sources and demand components. Redundancy design is defined here as architectural (components and their connections) options in the instantiated system architecture that are capable of satisfying the same function.
Determining the reliability importance of switching elements in the shuffle-exchange networks
Published in International Journal of Parallel, Emergent and Distributed Systems, 2019
Fathollah Bistouni, Mohsen Jahanshahi
In general, there are two main approaches to improve the reliability of a system: fault tolerance and fault avoidance. Fault tolerance can be achieved by creating redundancy in system components so that if a component fails, the successor components can be used. In other words, this approach does not take any action until a fault occurs, and then takes the necessary steps to deal with system failure. Although this approach may be to avoid the failure of the whole system, it can lead to reduced system performance (e.g. increase in response time) compared to normal system operation. In addition, the redundancy can lead to an increase in design complexity, cost, weight, space requirements, and so on. In contrast, fault avoidance has a prevention strategy using high-quality and high-reliability components, and it is usually more affordable compared to fault tolerance methodology.