问题
单项选择题
（）is the budgeted amount for the work actually completed on the schedule activity or WBS component during a giving time period.
A.Plannedvalue
B.Earned value
C.Actualcost
D.Costvariance
答案
参考答案：B
解析：
该题的关键词为"budgeted amount for the work actually completed"，其语句结构为"（）（主语）is（谓语）the budgeted amount for the work actually completed"，含义为"什么是实际完成工作对应的预算"，容易判断该语句正是挣值( Earned value)的定义。