International Journal of Reliability, Risk and Safety: Theory and Application

International Journal of Reliability, Risk and Safety: Theory and Application

Basic info

  • Publisher: ARI
  • Country of publisher: iran, islamic republic of
  • Date added to EuroPub: 2020/Dec/29

Subject and more

  • LCC Subject Category: Reliability and Risk Analysis, Engineering
  • Publisher's keywords: Reliability, Risk, Safety, maintenance, Probability
  • Language of fulltext: english
  • Time from submission to publication: 15 weeks

Publication charges

  • Article Processing Charges (APCs): No
  • Submission charges: No
  • Waiver policy for charges? No

Open access & licensing

  • Type of License: CC BY
  • License terms
  • Open Access Statement: Yes
  • Year open access content began: 2018
  • Does the author retain unrestricted copyright? False
  • Does the author retain publishing rights? True

Best practice polices

  • Permanent article identifier: DOI
  • Content digitally archived in: Other
  • Deposit policy registered in: None

This journal has '5' articles

Reliability Model of Fuzzy Consecutive k-out-of-n: F System

Reliability Model of Fuzzy Consecutive k-out-of-n: F System

Authors: eman elghamry, medhat ahmed eldamcesse, mohamed shokry nayel
Year: 2019, Volume: 1, Number: 1
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Abstract

Redundancy can be used to increase system reliability. The most popular type of redundancy, k-out-of-n system structure, finds wide applications in both industrial and military systems. Aspecial type of this system is the consecutive k-out-of-n:F system C(k,n:F) which have been proposed for reliability evaluation and integrated circuits design, microwave relay stations in telecommunication system, oil pipelines systems, vacuum systems in accelerators, computer ring networks, and spacecraft relay stations. In this paper, we will discuss a new algorithm for evaluating the fuzzy reliability of any fuzzy linear consecutive k-out-of-n:Fsystem (Lin/C(k,n:F)) with independent, unrepairable, and non-identical components.Later,we will introduce a model of unrepairable system consists of parallel subsystems if each subsystem is Lin/C(k,n:F). Due to uncertainty and insufficient data, failure time of each component follows fuzzy Rayleigh distribution with one fuzzy parameter. This fuzzy parameter is represented by triangular membership function and estimated from statistical data taken from random samples of each component. Furthermore, a numerical example for a fuzzy unrepairable parallel system with three subsystems is given while eachsystem is represented by Lin/C(k,n:F).Also, the failure time of each component follows fuzzy Rayleigh distribution to get analytically and represents the fuzzy reliability function of this fuzzy system graphically.

Keywords: of-n:F system Rayleigh distribution Fuzzy parameters Reliability Linear system
Industry 4.0: Some Challenges and Opportunities for Reliability Engineering

Industry 4.0: Some Challenges and Opportunities for Reliability Engineering

Authors: Mohammad Ali Farsi , Enrico Zio
Year: 2019, Volume: 1, Number: 1
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Abstract

According to the development of Industry 4.0 and increase the integration of digital, physical and human worlds, reliability engineering must evolve for addressing the existing and future challenges about that. In this paper, the principle of Industry 4.0 is presented and some of these challenges and opportunities for reliability engineering are discussed. New directions for research in system modeling, big data analysis, health management, cyber-physical system, human-machine interaction, uncertainty, jointly optimization, communication, and interfaces are proposed. Each topic can be investigated individually, but this paper summarizes them and prepared a vision about reliability engineering for consideration and discussion by the interested scientific community.

Keywords: Reliability engineering Industry 4.0 Challenges Big data health management cyber-physical system Human-machine interaction jointly optimization communication and interfaces
Probabilistic Assessment of Two-Unit Parallel System with Correlated Lifetime under Inspection Using Regenerative Point Technique

Probabilistic Assessment of Two-Unit Parallel System with Correlated Lifetime under Inspection Using Regenerative Point Technique

Authors: VIJAY VIR SINGH ; PRAVEEN KUMAR POONIA
Year: 2019, Volume: 1, Number: 1
(0 downloads)
Abstract

This paper deals with the reliability analysis of a complex system consisting ofa two dissimilar unit’ in a parallel configuration with correlated lifetime distribution. The system stops functioning when both units stop working. Both units are inspected periodically as well as being examined before assigning to repair facility. Under consideration of the system have two states: Normal and failed. Regenerative point technique has been used for the mathematical formulation of the model. The system is analyzed using Laplace transforms to solve the mathematical equations. Reliability, Availability, MTSF, Busy Period of repairmen and Cost-effectiveness of the system has been computed. The computed results have been demonstrated by tables and graphs. The repair time of both the units follows the negative exponential distribution with different parameters in a joint probability density function. The inspection times are assumed to follow the general distribution. Some particular cases of the system have also been derived from seeing the practical importance of the model.

Keywords: Reliability MTSF Sojourn Times Availability Busy time Profit function
Moving from One Site to Multi-Site Vulnerability Studies: Decision Analysis for Trade-off Between Risks and Benefits

Moving from One Site to Multi-Site Vulnerability Studies: Decision Analysis for Trade-off Between Risks and Benefits

Authors: Seyed Mojtaba Hoseyni , Anna Calissano
Year: 2019, Volume: 1, Number: 1
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Abstract

This paper provides a vulnerability study for a gas production site. Decision tree analysis is implemented to provide risk-informed decisions on the maintenance strategies to minimize the unavailability and downtime costs. In this context, the decision analysis assesses the impact on the availability of the plant after having decided to buy some spare parts to mitigate the criticality of some equipment. This will help the decision makers to make an optimal decision before spending their budget on buying the spare parts while they can reliably forecast a maximizedavailability. The decision analysis also will move from onesite approach to the multi-site vulnerability studies. Result concludes a recommendation for the company on deciding the optimum maintenance strategies and provides a list of required spare parts to be bought in advance to reduce the associated risks and costs.

Keywords: Decision Analysis Maintenance Decision Risk Vulnerability
Optimization of Electrical Distribution System Maintenance Process Based on Failure Modes

Optimization of Electrical Distribution System Maintenance Process Based on Failure Modes

Authors: Mohammad Hajivand , Masoud Zahedi Vahid , Farzad Goudarzvand Chegini , Poorya Rahmati-Kahkha , Reza Hajivand
Year: 2019, Volume: 1, Number: 1
(0 downloads)
Abstract

This paper presents a novel scheme for comprehensive planning of reliability-centered maintenance (RCM) in the electrical distribution system to minimize the costs of cable repair and maintenance. To this end, a new formulation is proposed by taking into account the maintenance costs for different cases, repairs, repair-caused load projects, and energy purchase or generation costs. To solve the given complex problem, one of the most powerful and newest particle intelligence techniques called GSO algorithm is employed. Simulations are carried out on a 30-bus test network. Moreover, three scenarios and ten cases are applied in the process of extracting results to analyze the impact of various items on parameters of the objective function.

Keywords: Reliability-Centered Maintenance Markov Model Distribution Network Group Search Optimization

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