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if you planned to finish80% of construction in6 months time, but you actually managed to finish only60% work due to delays ,than what is the SPI in that case??
Schedule Performance Index (SPI) A measure of schedule efficiency on a project. It is the ratio of earned value (EV) to planned value (PV). SPI = EV divided by PV.
SPI = 60% /80% = .75 < 1 behind schedule.
I agree with Mr.Alex as he gives the right answer.
