Formulas Flashcards
(22 cards)
PERT Triangular Distribution
(O+M+P)/3
PERT Beta Distribution
(O+4M+P)/6
Standard Deviation of an Activity
(P-O)/6
Variance of an Activity
[(P-O)/6] squared
Range of an Activity Duration
EAD plus or minus SD
Total Float
LS-ES (Late and Early Start)
or
LF-EF (Late and Early Finish)
EV
Earned Value
PV
Planned Value
AC
Actual Cost
CV
Cost Variance
EV-AC
SV
Schedule Variance
EV-PV
CPI
Cost Performance Index
EV/AC
SPI
Schedule Performance Index
EV/PV
BAC
Budget at Completion
Determined during cost management, in Determine Budget Process. Includes contingency reserves and defines total cost to be spent during project.
ETC
Estimate to Complete
Re-estimation of remaining work
EAC-AC
EAC
Estimate at Completion
Three different approaches using EV, SPI, and CPI
AC+(BAC-EV) - assumes future work to be accomplished at budgeted rate
BAC/CPI - assumes cost performance til now is expected to continue
(BAC-EV)/(CPI*SPI) - considers both cost and schedule performance indices when estimating efficiency of ETC work
VAC
Variance at Completion
BAC-EAC
TCPI
To-Complete Performance Index
Two approaches
No new EAC value: (BAC-EV)/(BAC-AC)
New EAC value: (BAC-EV)/(EAC-AC)
PV
Present Value
Time value of money and value of a future cash flow
FV/[(1+r)to the n]
Number of Communication Channels Formula
[N(N-1)]/2
EMV
Expected Monetary Value of opportunity or threat
Probability * Impact
PTA
Point of Total Assumption
Applicable only in FPIF contracts. Costs above PTA are considered to be due to mismanagement.
[(Ceiling price-target price)/Buyer’s sharing ratio]+Target Cost
