Pmp Formulas Cheat Sheet
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1
2
3by Edward Chung, PMP ( )
PMP Formulas mentioned in the
PMBOK Guide 5th Edition
Name (Abbreviation)
Formula
Interpretation
n should include the project
manager
No. of
n (n-1)/2
e.g. if the no. of team members
Communication
increase from 4 to 5, the increase
n = number of members in the team
in communication channels:
Channels
5(5-1)/2 – 4(4-1)/2 = 4
SPI
= EV/PV
Schedule
< 1
behind schedule
= 1
on schedule
Performance Index
EV = Earned Value
> 1
ahead of schedule
(SPI)
PV = Planned Value
< 1
Over budget
= 1
On budget
CPI
= EV/AC
> 1
Under budget
Cost Performance
sometimes the term ‘cumulative
EV = Earned Value
Index (CPI)
CPI’ would be shown, which
AC = Actual Cost
actually is the CPI up to that
moment
SV
= EV – PV
< 0
Behind schedule
Schedule Variance
= 0
On schedule
EV = Earned Value
> 0
Ahead of schedule
(SV)
PV = Planned Value
CV
= EV – AC
< 0
Over budget
= 0
On budget
Cost Variance (CV)
EV = Earned Value
> 0
Within budget
AC = Actual Cost
EAC
= AC + New ETC
Estimate at
if the original estimate is based
on wrong data/assumptions or
AC = Actual Cost
Completion (EAC) if
circumstances have changed
New ETC = New Estimate to Completion
original is flawed
EAC
= AC + BAC – EV
Estimate at
the variance is caused by a one-
Completion (EAC) if
AC = Actual Cost
time event and is not likely to
happen again
BAC remains the
BAC = Budget at completion
same
EV = Earned Value
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