单选题 The earned value technique is a commonly used method of performance measurement．It integrates project scop,schedule,and cost measures to help the project management team assess project performance.If aproject's Cost Performance Index(CPI=EV/AC) value less than 1.0，it means that______。
A．the cost savings for work completed
B．the project is ahead of its planned schedule
C．the cost overrun for work completed
D．less work was completed than was planned

【正确答案】 C

【答案解析】[解析] 挣值管理(EVM)是一种常用的绩效测量方法。它综合考虑项目范围、进度和成本指标，帮助项目管理团队评估项目绩效。如果某个项目的成本绩效指数(CPI=EV/AC)值少于1.0，则说明己完成的工作的成本超支(the cost overrun for work completed)。