Cost variance |
CV = EV - AC |
Historical measurement of past cost
performance. |

Schedule variance |
SV = EV - PV |
Historical measurement of past scheduled work accomplishment
performance; can also be viewed as a variance on value. |

Cost performance index (CPI) |
CPI = EV/AC |
Index of cost efficiency of past cost performance. A figure
less than 1 indicates more actual cost is being paid than is value being
earned. |

Schedule performance index (SPI) |
SPI = EV/PV |
Index of scheduled-work efficiency of past scheduled
performance. A figure less than 1 indicates more actual time is being consumed
than was planned for the value earned. Can also be thought of as an index on
value accumulation in the project. |

COST estimate to complete (ETC) |
ETC = PVR/CPI |
ETC is equal to remaining or unearned value normalized to
the historical cost performance. A CPI less than 1 will inflate the ETC to
greater than the remaining budget. PVR = PV remaining. |

COST estimate at completion (EAC) |
EAC = AC + ETC |
EAC is the total forecasted funds needed to do the
project. |

To complete performance index (TCPI) |
TCPI = PVR/ETC |
TCPI less than 1 means the project will overrun the
remaining budget for the work remaining. |

SCHEDULE estimate to complete (STC) |
STC = (SR) * (EVR)/(PVR) |
SR = schedule remaining.
EVR = EV remaining. |

SCHEDULE estimate at completion (SAC) |
SAC = STD + (SR) * (EVR)/(PVR) |
STD = schedule to date. |