问题
单项选择题
The earned value technique is a commonly used method of performance measurement. It integrates project scope, cost, and schedule measures to help the project management team assess project performance. If a project’s Schedule Performance Index (SPI=EV/PV) value less than 1.0, it means that （）.
A．the project is ahead of its planned schedule
B．less work was completed than was planned
C．the cost overrun for work completed
D．the cost under-run of performance to date
答案
参考答案：B
解析：
[分析]： 根据《系统集成项目管理工程师教程》(全国计算机专业技术资格考试办公室组编)第9.5.3小节的内容可知，SPI值小于1表示实际进度落后于计划进度。
因此，正确答案应选B。