To assure the precision of evaluations and predictions, a good software reliability model should have the function of describing test coverage and can reflect the fault repair process.

为了保证可靠性模型的估测精度，好的软件可靠性模型应该包括对测试覆盖的说明，并且能够反映软件的错误修复过程。

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In this paper, we firstly review the Non homogeneous Poisson Process (NHPP) model based on test coverage, and then discuss a Non homogeneous Markov model with fault repair.

本文在基于测试覆盖的NHPP模型的基础上，讨论一种能反映软件错误修复过程的非齐次马尔可夫模型。

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However, if you are truly concerned about the prospect of an expensive repair, stick with the Powertrain coverage and think about shopping around with other warranty companies.

WSJ: By JONATHAN WELSH

Any repair or replacement made under this Lithium-Ion Battery Capacity Coverage may not return a Lithium-Ion battery to an "as new" condition with all 12 battery capacity bars, but it will provide the vehicle with a capacity level of nine bars or more on the battery capacity level gauge.

ENGADGET: Nissan upgrades US Leaf warranties, will 'restore' batteries that lose too much charge