MTTF在可用性评估中的失败

Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318) Pub Date : 2002-08-07 DOI:10.1109/RAMS.2002.981655

Hairong Sun, J.J. Han

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引用次数: 10

摘要

本文提出用一个截形浴盆来模拟完全老化产品的故障率。我们揭示了一些反直觉的观察结果，例如，增加MTTF并不一定会增加产品生命周期内的平均可用性和瞬时可用性，而平均可用性和瞬时可用性可以在不改变MTTF的情况下得到改善。MTTF和稳态可用性不是特别有用，不能评估时变故障率和短升级间隔的产品。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The failure of MTTF in availability evaluation

In this paper, a truncated bathtub is proposed to model the failure rate of a product with perfect burn-in. We expose some counter-intuition observations, e.g., increasing the MTTF does not necessarily increase the average and instantaneous availability during the product's lifetime, and the average and instantaneous availability could be improved without changing the MTTF. The MTTF and the steady-state availability are not particularly informative and fail to evaluate the product with time-varying failure rate and short upgrading interval.

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Annual Reliability and Maintainability Symposium. 2002 Proceedings (Cat. No.02CH37318)

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