PgMP  Math Formulas
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Budget at Completion (BAC)
How much is budgeted for the total job

Planned Value (PV)
 Planned % complete x BAC
 How much should be done?

Earned Value (EV)
 Actual % complete X BAC
 How much work is done?

Actual Cost (AC)
How much has been spent?



Cost Performance Index (CPI)

Schedule Performance Index (SPI)

Estimate at Completion (EAC)
 BAC / CPI
 AC+ ETC original estimates are FLAWED or CAN’T be used
 AC + (BACEV) variance will NOT occur in future
 AC+((BACEV) / CPI) variance WILL occur in future

Estimate to Complete (ETC)
 EAC – AC
 BACEV atypical variance (will NOT occur ) in future
 (BACEV) / CPI typical variance (will occur ) in future

Variance at Completion (VAC)
BAC – EAC

To Complete Performance Index (TCPI)
(BACEV) / (BAC – AC)


Standard Deviation (SD)
(PO) / 6

Task Variance (TV)
 [(PO) / 6]^{2}
 Standard Deviation squared

Project Variance
 Square root of the sum of the Task Variance

# of Communication Channels
 N ( N1 ) / 2 OR
 ( N^{2} – N ) / 2

Present Value (PV)
 FV / ( 1 + R )^{T}
 R = Interest Rate
 T = # of time Periods

Future Value (FV)
 PV x ( 1 + R )^{T}
 R = Interest Rate
 T = # of time Periods

Sigma Normal Distribution
 1 sigma = 68%
 2 sigma = 95%
 3 sigma = 99.7%
 6 sigma = 99.9%

Expected Monetary Value (EMV)
Probability x Impact