A reward-based performability modelling of a fault-tolerant safety–critical system

Ahamad, Shakeel; Gupta, Ratneshwer

doi:10.1007/s13198-023-02055-3

Cited by 1 publication

(2 citation statements)

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“…The system's intrinsic reliability, failure, MTTF, etc., for a system in a normal condition are all used by analytical approaches to assess performability [23]. State-based modeling methods like Petri nets [24][25][26], stochastic activity networks (SANs) [27], and Markov chains [28][29][30] are used in behavioral probabilistic modeling [31].…”

Section: Literature Reviewmentioning

confidence: 99%

“…A continuous-time Markov chain with a Markov reward model was employed to assess the fault-tolerant SCS's performability. The reliability, availability, average failure frequency, and system throughput were used to evaluate the system's performability [29]. The system's performability in terms of availability and dependability was analyzed using Markov and regenerative processes [34].…”

Section: Literature Reviewmentioning

confidence: 99%

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Performability Evaluation of Autonomous Underwater Vehicles Using Phased Fault Tree Analysis

Byun,

Lee

2024

JMSE

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This paper presents a phased fault tree analysis (phased-FTA)-based approach to evaluate the performability of Autonomous Underwater Vehicles (AUVs) in real time. AUVs carry out a wide range of missions, including surveying the marine environment, searching for specific targets, and topographic mapping. For evaluating the performability of an AUV, it is necessary to focus on the mission-dependent components and/or subsystems, because each mission exploits different combinations of devices and equipment. In this paper, we define a performability index that quantifies the ability of an AUV to perform the desired mission. The novelty of this work is that the performability of the AUV is evaluated based on the reliability and performance of the relevant resources for each mission. In this work, the component weight, expressing the degree of relevance to the mission, is determined using a ranking system. The proposed ranking system assesses the performance of the components required for each mission. The proposed method is demonstrated under various mission scenarios with different sets of faults and performance degradations.

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