For activities with good historical records, it can be the case that a typically non-linear profile of cost expenditures and completion proportions can be estimated.

而对有些历史数据完全的工作，即便数据之间成非线性关系，仍可预测其成本超支和完工百分比。

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Because management of Medicare benefits is so lax, government experts have estimated that about 10 percent of Medicare expenditures are lost to fraud and abuse (the magnitude of fraud and abuse in Medicaid is of similar scale).

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