Formulas and Memorization

Question 1

BAC

Answer 1

Budgeted at Completion

Question 2

PV

Answer 2

Planned Value

PV = “Planned% Complete” x BAC

Question 3

EV

Answer 3

Earned Value

EV = “Actual% Complete” x BAC

Question 4

AC

Answer 4

Actual Cost

Question 5

CV

Answer 5

Cost Variance

CV = EV - AC

Question 6

SV

Answer 6

Schedule Variance

SV = EV - PV

Question 7

CPI

Answer 7

Cost Performance Index

CPI = EV/AC

Question 8

CPI^c

Answer 8

Cumulative CPI

CPI^c = EV^c/AC^c

Question 9

SPI

Answer 9

Schedule Performance Index

SPI = EV/PV

Question 10

EAC

Answer 10

Estimate at Completion
EAC = BAC/CPI^c

AC+(BAC-EV)
AC + (BAC-EV)/(CPI*SPI)
AC+ETC

Question 11

ETC

Answer 11

Estimate to Completion

ETC = EAC - AC

Question 12

VAC

Answer 12

Variance at Completion

VAC = BAC - EAC

Question 13

TCPIc

Answer 13

To-Complete Performance Index

BAC - EV) / (ETC

Question 14

Beta Distribution

Answer 14

PERT (Three-Point Estimating)

(P+4R+O)/6

Question 15

Standard Deviation (sigma)

Answer 15

PERT (Three-Point Estimating)
(P-O)/6

sigma^2 = [sum(x - mu)^2] / N

mu = mean

Question 16

Triangular Distribution

Answer 16

PERT (Three-Point Estimating)

(P+R+O)3

Question 17

EF

Answer 17

Early Finish

EF = ES + Duration - 1

Question 18

LS

Answer 18

Late Start

LS = ES + Float

Question 19

LF

Answer 19

LF = LS + Duration - 1

Question 20

Float

Answer 20

Float = LS-ES or LF-EF

Bottom-left minus top-left, or bottom-right minus top-right

Question 21

Communication Channels

Answer 21

Channels = n(n-1)/2

Question 22

PTA

Answer 22

Point of Total Assumption

Target cost + (Ceiling price - target price) / (Buyer’s % share of cost overrun)

Question 23

Discount Formula

Answer 23

PV = FV / (1 + ‘discount rate’)^period

PV = Present Value
FV = Future Value