The probability distribution and risk curve of schedule and cost are obtained by statistic analysis, providing a basis for risk evaluation of engineering projects.

通过统计分析得到进度和费用的模拟概率分布，进而得到进度和费用风险曲线，为评价工程项目的风险提供了依据。

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By applying the theory of reliability to the analysis of the life distribution and operating cost of car axle, the model of economical policy decision about repair cycle of car axle is set up.

通过对车轴寿命分布及其运用成本的分析，运用可靠性理论建立了车轴检修周期经济决策模型。

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Results from economic analysis and case simulations show that using this approach the transient voltage quality level in distribution system can be evidently improved without cost increase.

经济性分析和算例结果表明，该方案在不增加成本的前提下大大提高了配电系统的暂态电压质量。

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