Products quality is guaranteed only through production processes, and sustainable improvement of processes deviation, cycle time and output are significant to cost reduction and revenue improvement.

产品质量由产品加工的过程来保证，而过程偏差、周期时间和产出的持续改进对于降低产品成本、增加收入具有十分重要的意义。

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By the feedback test of computer system, the deviation has been verified and such optimum operational program that could control the minimum operation cost has been set up.

通过计算机系统的反馈验证，找出了偏差并制定了能控制最小运行费用的新优化运行方案。

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It corrects the deviation derived from traditional earned value method when forecasting the duration and cost, and it supplies more analysis information than traditional earned value method.

该方法能改进传统挣值法在预测工期、成本方面产生的偏差，并且与传统挣值方法相比，增加了更多的原因分析信息。

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So, the optimal thing to do if you live in a world like this n is to get n as large possible and you can reduce the standard deviation of the portfolio very much and there's no cost in terms of expected return.

如果现实中也这样简单的话,那么你就尽量增大,这样就能让投资组合的标准差,就会大大降低,从预期收益率的角度来看,这样做的成本是零。

耶鲁公开课 - 金融市场课程节选