The question is based on Concept of PMBOK, where Schedule Performance Index (SPI) and Cost Performance Index (CPI) are two critical ratio, calculated as
SPI = Earned value / Planned Value of a project
If , SPI >1 , ahead of schedule
SPI <1, below the schedule
SPI = 1, as per schedule
CPI = Earned value / Actual Cost
CPI<1, earning less than the amount spent
CPI> 1, earning more than the amount spent
CPI=1 , earning equal to amount spent
As per given data , in 20 days Earned Value = 33,
Planned Value per day = total earning / total days = 200/100 = 2
Planned value in 20 days = 2*20= 40.
SPI =33/40 = 0.825.
SPI<1, Project is running behind schedule
Actual cost data is missing, so cannot say anything about CPI.
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