Formula Memorization Trick

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

When memorizing the

formulas I have found

it best to look for

patterns. When I see

the correct pattern I

know the formula is

correct.

AC = ACWP

PV = BCWS

EV = BCWP

Formula Memorization Trick

Ok lets build this.

First is to see the

pattern of 2

subtractions, 3

divides, 2

subtractions

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

Formula Memorization Trick

Next see the pattern

of Variance and

Index.

Cost, Schedule and

Cost, Schedule.

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

Formula Memorization Trick

Next see the pattern

of Earned Value (EV).

This used to be

BCWP.

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

Formula Memorization Trick

Next see the pattern

of Actual Cost (AC)

and Planned Value

(PV) and how they

alternate. Skip a line

and its AC again.

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

Formula Memorization Trick

Next see the pattern

of Estimated at

Completion (EAC).

As well as Budget at

Completion (BAC)

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

Formula Memorization Trick

Not much left. Notice

that CPI is divisor of

EAC so find CPI skip

a line and place it at

the end of EAC

formula.

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

ETC and VAC don’t

really match to

anything, you just

have to know where

they go.

Formula Memorization Trick

This may look

confusing but it

worked great

for me and I

have had

others tell me it

worked for

them as well.

CV = EV - AC

SV = EV - PV

CPI = EV / AC

SPI = EV / PV

EAC = BAC / CPI

ETC = EAC - AC

VAC = BAC - EAC

Other Formulas to Know

• Communication Channels: N(N-1)/2

• Pert Mean: (Pessimistic + 4*Most Likely +

Optimistic) / 6

• Standard Deviation: (Pessimistic – Optimistic) / 6

• Variance: ((Pessimistic – Optimistic) / 6) squared

• Present Value or PV: Future Value / (1+ rate of

return) to the power of n. Where n = periods of

time.