题目内容
（请给出正确答案）
[主观题]
下列要素中，不属于DFD的是（10)。当使用DFD对一个工资系统进行建模时，（11)可以被认定为外部实体。A．
下列要素中，不属于DFD的是(10)。当使用DFD对一个工资系统进行建模时，(11)可以被认定为外部实体。
A．加35
B．数据流
C．数据存储
D．联系
提问人：网友shmlove520
发布时间：2022-01-06
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Estimating schedule activity costs involves developing an(4)of the cost of the resources needed to complete each schedule activity. Cost estimating includes identifying and considering various costing alternatives. For example, in mostapplication areas, additional work during a design phase is widely held to have the potential for reducing the cost of the execution phase and product operations. The cost estimating process considers whether the expected savings can offset the cost of the additional design work. Cost estmates are generally expressed in units of(5)to facilitate comparisions both within and across projects. The(6)describes important information about project requirement that is considered during cost estimating.
A．accuracy
B．approxination
C．specification
D．summary
