单选题
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