工作分解结构是范围变更控制的一个输入，因为它：（）

It is possible to transfer risk through the use of insurance If the estimated probability of damage occurring to an asset is 2 percent, the insurance cost is $5,000, and the total worth of the asset is $300,000, is it worth insuring the asset？

All of the following are tools for scope verification EXCEPT

质量可被定义为 （）

挣值管理的一个挑战是预计完工比例用于计算挣值的最简单公式是____