()isameasureofscheduleperf（2021上半年系统集成项目管理工程师上午综合知识真题解析）
( ) is a measure of schedule performance expressed as the difference between the earned value and the planned value.
A、 Schedule variance (SV)
B、 Cost variance (CV)
C、 Actual cost (AC)
D、 Earned value (EV)
参考答案： A
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