A practical reliability allocation method considering modified criticality factors

Yadav, Om Prakash; Zhuang, Xing

doi:10.1016/j.ress.2014.04.003

Cited by 57 publications

(76 citation statements)

References 13 publications

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“…In, the potential reliability improvement effort factor is proposed to overcome the drawback that the assigned reliability is lower than the current level. The non‐linear relationship between the current failure rate and the potential effort can be described by this factor as the component (or system) with a high failure rate is likely to have more potential for further improvement with relatively less effort …”

Section: Proposed Reliability Allocation Methodsmentioning

confidence: 99%

Reliability Allocation for Series‐Parallel Systems subject to Potential Propagated Failures

Cao

Liu

Fang

2020

Quality & Reliability Eng

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To analyze the dependent failures in the early stage of system development, this paper considers the potential propagated failures in the reliability allocation process. Factors which can be used to not only measure the component importance but also to reflect the influence brought by propagated failures are proposed. Specifically, cooperative game theory is introduced to explore how the propagated failures affect the failure severity level. Failure rates are obtained by using the Alpha Factor Model with the consideration of dependence among components. Reliability improvement rate is also developed to proportionally assign the target improvement of system reliability to the corresponding components. Furthermore, reliability allocation frameworks for series, parallel and series‐parallel systems are designed respectively to make the proposed model meet a wide range of applications. An illustrative example of a hydraulic cooling system is presented to show how the proposed approach is applied. The allocation results demonstrate that the proposed method can achieve a valid reliability improvement with the minimum error.

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Section: Proposed Reliability Allocation Methodsmentioning

confidence: 99%

Reliability Allocation for Series‐Parallel Systems subject to Potential Propagated Failures

Cao

Liu

Fang

2020

Quality & Reliability Eng

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“…Recently, Yadav et al [25] notice the efforts of reliability improvement and describe it as a function which related to failure rate. The modified evaluation criteria of subsystem i based on the method presented by Kim is given by:…”

Section: Cost-based Allocation Methodsmentioning

confidence: 99%

A comprehensive and practical reliability allocation method considering failure effects and reliability costs

Yu¹,

Zhang²,

Ran³

et al. 2018

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…Considering the case that the failure severities of a subsystem are evenly distributed in the range of 1 to 10, which means [1,10] i S Î . The advantage of exponential transformed function in dealing with severity is shown as follow:…”

Section: Comprehensive Allocation Methodsmentioning

confidence: 99%

“…At the same time, failure severities can be divided into three intervals: the low interval ( [1,3] i S Î ), the moderate interval ( [4,7] i S Î ) and the high interval ( [8,10] i S Î ). Considering the case that all failure severities concentrate on the low interval and the moderate interval, the transformed function is not suitable because it cannot reveal the characteristics of low severities' effects.…”

Section: Limitationsmentioning

confidence: 99%

“…An exponential transformed failure severity was presented in order to reduce the occurrence of the unacceptable failure effects in a newly designed system. Subsequently, this method was developed in the study of YADAV, et al [10] . In their study, a three-dimensional method was introduced in analyzing the reliability allocation of mechanical systems.…”

Section: Introduction mentioning

confidence: 99%

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Comprehensive reliability allocation method for CNC lathes based on cubic transformed functions of failure mode and effects analysis

Yang¹,

Zhu²,

Ren³

et al. 2015

Chin. J. Mech. Eng.

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Reliability allocation of computerized numerical controlled(CNC) lathes is very important in industry. Traditional allocation methods only focus on high-failure rate components rather than moderate failure rate components, which is not applicable in some conditions. Aiming at solving the problem of CNC lathes reliability allocating, a comprehensive reliability allocation method based on cubic transformed functions of failure modes and effects analysis(FMEA) is presented. Firstly, conventional reliability allocation methods are introduced. Then the limitations of direct combination of comprehensive allocation method with the exponential transformed FMEA method are investigated. Subsequently, a cubic transformed function is established in order to overcome these limitations. Properties of the new transformed functions are discussed by considering the failure severity and the failure occurrence. Designers can choose appropriate transform amplitudes according to their requirements. Finally, a CNC lathe and a spindle system are used as an example to verify the new allocation method. Seven criteria are considered to compare the results of the new method with traditional methods. The allocation results indicate that the new method is more flexible than traditional methods. By employing the new cubic transformed function, the method covers a wider range of problems in CNC reliability allocation without losing the advantages of traditional methods.

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A practical reliability allocation method considering modified criticality factors

Cited by 57 publications

References 13 publications

Reliability Allocation for Series‐Parallel Systems subject to Potential Propagated Failures

Reliability Allocation for Series‐Parallel Systems subject to Potential Propagated Failures

A comprehensive and practical reliability allocation method considering failure effects and reliability costs

Comprehensive reliability allocation method for CNC lathes based on cubic transformed functions of failure mode and effects analysis

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