In earned value management, which index indicates schedule efficiency?

In earned value management, which index indicates schedule efficiency?

• A. CPI
• B. EV
• C. SPI
• D. PV

Answer: (C)

In earned value management, schedule efficiency is captured by the Schedule Performance Index. It compares how much work was actually earned to how much work was planned to be completed, using EV divided by PV. EV is the value of work actually completed, while PV is the value of work that was planned to be completed by this point. An SPI greater than 1 means you’re ahead of schedule, an SPI less than 1 means you’re behind, and an SPI of 1 means you’re on schedule. This is distinct from cost efficiency, which is measured by the Cost Performance Index (CPI = EV/Actual Cost). For example, if PV is 100 and EV is 110, SPI is 1.1 (ahead). If PV is 120 and EV is 110, SPI is about 0.92 (behind).

In earned value management, schedule efficiency is captured by the Schedule Performance Index. It compares how much work was actually earned to how much work was planned to be completed, using EV divided by PV. EV is the value of work actually completed, while PV is the value of work that was planned to be completed by this point. An SPI greater than 1 means you’re ahead of schedule, an SPI less than 1 means you’re behind, and an SPI of 1 means you’re on schedule. This is distinct from cost efficiency, which is measured by the Cost Performance Index (CPI = EV/Actual Cost). For example, if PV is 100 and EV is 110, SPI is 1.1 (ahead). If PV is 120 and EV is 110, SPI is about 0.92 (behind).