Each time you complete or update an estimate and upon completion of a project, you should document the information that proved pertinent and record lessons learned.
每一次您完成或者升级一个评估和项目的完成，都应当记录那些相关的信息和得到的经验教训。
Unlike on waterfall projects, an overall project estimate is adjusted after each iteration to improve its accuracy.
不像瀑布项目，项目评估在每次迭代中进行调整，不断改善精度。
Principle of maximum social income require to estimate the revenue and cost of each project of government decision, then choose the one that has maximum net revenue.
最大社会收益原则要求估计公共决策每一方案的收益和成本，选择社会净收益最大的方案。
Principle of maximum social income require to estimate the revenue and cost of each project of government decision, then choose the one that has maximum net revenue.
最大社会收益原则要求估计公共决策每一方案的收益和成本，选择社会净收益最大的方案。
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