Mary is managing a data migration project and the project is currently in the executing phase. The project's current total earned value (EV) is $25,000 and the current schedule variance (SV) is $5,000. What is the project's current schedule performance index (SPI) ?

Answer:The answer is 1.25

Explanation:

To calculate SPI, we use the formula SPI = EV : PV

EV = $25,000, PV = unknown, SV = $5,000

SV = EV - PV

5,000 = 25,000 - PV

Making PV the subject of formula

PV = 25,000 - 5,000

PV = 20,000

SPI = 25,000 : 20,000

SPI = 1.25

Since it is greater than 1, the project is on track and has a favourable conditions

Schedule performance index (SPI) = 1.25

Explanation:

Earned value (EV) - planned value (PV) = Schedule variance (SV)

25000 - PV = 5000

collecting like terms means taking PV to the right-hand side of the equation & 5000 to the left-hand side of the equation.

25000 - 5000 = PV

PV = 20000

Schedule performance index (SPI) = EV : PV

SPI = 25000 : 20000 = 1.25