Formulae Flashcards
(27 cards)
PV (Present Value)
FV/((1 + i)^n)
EAD (Expected Activity Duration) - Triangular
(O+M+P)/3
EAD (Expected Activity Duration) - Beta/PERT
(O+4M+P)/6
SD (Standard Deviation)
(P-O)/6
AV (Activity Variance)
SD^2
Range of Activity Duration
EAD +/- SD
EF (Early Finish)
 ES + Duration - 1
LS (Late Start)
 LF - Duration + 1
Total Float
 LS - ES, or LF - EF
Rough Order of Magnitude
-25% to +75%
Definitive estimate
-5% to +10%
CP (Critical Path)
 Sum of longest duration path
CV (Cost Variance)
EV - AC
SV (Schedule Variance)
EV - PV
CPI (Cost Performance Index)
EV / AC
SPI (Schedule Performance Index)
EV / PV
EAC (Estimate At Completion), using the most accurate method
AC + Bottom-up ETC
EAC (Estimate At Completion), assuming variances are typical
BAC / CPI
EAC (Estimate At Completion), assuming variances are atypical
AC + (BAC - EV)
EAC (Estimate At Completion), assuming poor cost performance and a need to hit a firm completion date
AC + ((BAC - EV) / (CPI * SPI))
ETC (Estimate To Complete)
EAC - AC
VAC (Variance At Completion)
BAC - EAC
TCPI (To Complete Performance Index), Standard Method
(BAC - EV) / (BAC - AC)
TCPI (To Complete Performance Index), assumes original budget is not possible
(BAC - EV) / (EAC - AC)
