质量统计是不可靠度的矩估计的严格增加函数。
The quality statistic is a monotonous function of a method of moments estimator of the unreliability.
利用概率分析方法研究在实故障源作用下，由函数单元构成的控制系统的可靠性，并给出了系统不可靠度的下界估计。
The reliability of the systems affected by the failure sources is studied and a lower bound of the unreliability is presented.
遗憾的是，这种方法虽然很流行，但是很不可靠。有许多因素会导致结果的偏差，所以无法信任单一度量值的精确性。
Sadly, the popularity of this approach does not trump its invalidity - there are just too many sources of variation to let you trust a single measurement.
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