Reliability and Availability Analysis of Process Systems under Changing Operating Conditions

Choi, Soo Hyoung

doi:10.1016/b978-0-444-63455-9.50108-2

Cited by 1 publication

(1 citation statement)

References 5 publications

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“…Systems for cloud computing, manufacturing, computer and communication networks, and industrial systems have all been thoroughly investigated (Yang & Tsao, 2019) [46]. Choi (2014) [47] put forth a rigorous approach that works well for solving the exact availability equation with reliability under fluctuating operational conditions. Levitin et al (2019) [48] suggested a probabilistic model based on discrete-state continuous-time stochastic processes for assessing the immediate availability of these repairable system components.…”

Section: Availabilitymentioning

confidence: 99%

A review of components of reliability for the evaluation of Programmable logic controller

Obele,

Aikhuele,

Nwosu

2024

WJEEE

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The control of processes is made smooth and effective by Programmable Logic Controllers (PLCs), which are essential to industrial automation. The assessment of PLCs' reliability is crucial since more and more sectors depend on them for crucial tasks. In-depth reviews of the components necessary to evaluate PLC system reliability are presented in this study. To ensure a robust review, the review first clarifies the basic concepts of reliability, highlighting the significance of system uptime and the ramifications of failures in industrial settings. Next, it examined the different elements that go into a PLC's overall reliability, such as availability, testability, and (maintenance and maintainability). The percentage of the reviewed papers that employed (maintenance and maintainability), testability, or availability to improve the reliability of PLC systems showed that, availability and (maintenance and maintainability) has been employed the most for enhancing system reliability, accounting for 32% each of publications analyzed, followed by testability, accounting for 28% respectively. The scatter chart that depicts the progression of reliability components from 2010 to 2023 also explained that the use of availability and (maintenance and maintainability) was increasing. This upward trend can be explained by the fact that repairable systems are heavily reliant on availability, whereas (maintenance and maintainability) tend to avoid unnecessary equipment breakdown and testability, which ensures the ease with which the functionality of any system or component can be ascertained with the required level of precision.

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