Planning Step-Stress Accelerated Life Tests With Two Experimental Variables

Xu, Haiyan; He-liang, Fei

doi:10.1109/tr.2007.903292

Cited by 28 publications

(9 citation statements)

References 18 publications

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“…Nevertheless, the use of constant‐stress loading sometimes may not result in failures during a specified test period and usually requires lengthy test duration. To address this issue, step‐stress loading yields failures relatively quicker than a constant‐stress test . In a step‐stress AT the test specimen is subject to a constant‐stress for a specific period of time, and then the stress is increased to the next higher level.…”

Section: Fundamentals Of At Methodsmentioning

confidence: 99%

A literature review on planning and analysis of accelerated testing for reliability assessment

Limon

Yadav

Liao

2017

Quality & Reliability Eng

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Accelerated testing has been widely used for several decades. Started with accelerated life tests with constant‐stress loadings, more interest has been focused prominently on accelerated degradation tests and time‐varying stress loadings. Because accelerated testing is crucial to the assessment of product reliability and the design of warranty policy, it is important to develop an efficacious test plan that encompasses and addresses important issues, such as design of stress profiles, sample allocation, test duration, measurement frequency, and budget constraint. In recent years, extensive research has been conducted on the optimal design of accelerated testing plans, and the consideration of multiple stresses with interactions has become a big challenge in such experimental designs. The purpose of this study is to provide a comprehensive review of important methods for statistical inference and optimal design of accelerated testing plans by compiling the existing body of knowledge in the area of accelerated testing. In this work, different types of test planning strategies are categorized, and their drawbacks and the research trends are provided to assist researchers and practitioners in conducting new research in this area.

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Section: Fundamentals Of At Methodsmentioning

confidence: 99%

A literature review on planning and analysis of accelerated testing for reliability assessment

Limon

Yadav

Liao

2017

Quality & Reliability Eng

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“…In other words, the desired (nondegenerate) optimal plan is equivalent to the degenerate one in terms of the specified optimality criterion. Recently, Xu and Fei [29] investigate the optimal two-stress step-stress ALT plans by extending the splitting procedure. It is proven that the degenerate plan corresponding to each nondegenerate plan tends to have better statistical performance [in terms of Asvar(log(t p ))], and that a nondegenerate plan is optimal when it has the same optimality criterion value as that of the optimal degenerate plan.…”

Section: Motivation and Problem Descriptionmentioning

confidence: 99%

Equivalent accelerated life testing plans for log‐location‐scale distributions

Liao

Elsayed

2010

Naval Research Logistics

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Accelerated life testing (ALT) is widely used to determine the failure time distribution of a product and the associated life-stress relationship in order to predict the product's reliability under normal operating conditions. Many types of stress loadings such as constant-stress, step-stress and cyclic-stress can be utilized when conducting ALT. Extensive research has been conducted on the analysis of ALT data obtained under a specified stress loading. However, the equivalency of ALT experiments involving different stress loadings has not been investigated. In this article, a log-location-scale distribution under Type I censoring is considered in planning ALT. An idea is provided for the equivalency of various ALT plans involving different stress loadings. Based on this idea, general equivalent ALT plans and some special types of equivalent ALT plans are explored. For demonstration, a constant-stress ALT and a ramp-stress ALT for miniature lamps are presented and their equivalency is investigated.

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“…Lu and Rudy [9] dealt with the Weibull CE model with the inverse power law in the simple SSALT. For more research on SSALTs (see for example, Xu and Fei [5], Nelson [16] and Wu et al [12]. On the other hand, in the multiple-step SSALT there is more than one change of stress level.…”

Section: Introductionmentioning

confidence: 99%

Multiple-step stress accelerated life for Weibull Poisson distribution with type I censoring

Hassan

Assar

Shelbaia

2014

International Journal of Basic and Applied Sciences

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This article presents multi-step stress accelerated life tests based on type I censoring. It is assumed that the lifetime at design stress has the Weibull Poisson distribution. The scale parameter of the Weibull Poisson failure time at constant levels is assumed to have an inverse power law of the stress levels. Under the assumption of a cumulative exposure model, the maximum likelihood method is used to obtain the estimators of the model parameters. The optimal design of the accelerated life tests is studied according to the A-optimality criterion to specify the optimal stress change time and the optimal censoring time. Finally, the numerical studies are performed to illustrate the proposed procedures.

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Planning Step-Stress Accelerated Life Tests With Two Experimental Variables

Cited by 28 publications

References 18 publications

A literature review on planning and analysis of accelerated testing for reliability assessment

A literature review on planning and analysis of accelerated testing for reliability assessment

Equivalent accelerated life testing plans for log‐location‐scale distributions

Multiple-step stress accelerated life for Weibull Poisson distribution with type I censoring

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