Formulas

Question 1

Calculate Float/Slack

Answer 1

Float/Slack = (LS – ES = LF - EF)

LS = Late start ES = Early start LF = Late finish EF = Early finish =

0 On critical path

< 0 Behind schedule

Question 1

Actual Cost (AC)

Answer 1

AC = CV / (CPI - 1) CV = Cost Variance CPI = Cost Performance Index

Question 1

Budget At Completion (BAC)

Answer 1

BAC = Sum(PV) PV = Planned Value

Question 2

Communication Channels

Answer 2

= N (N-1) / 2 N = # of people in project

Question 4

Cost Variance (CV)

Answer 4

CV = EV - AC (>0) EV = Earned Value AC = Actual Cost

Question 4

Cost Performance Index (CPI)

Answer 4

CPI = EV / AC (>1) EV = Earned Value AC = Actual Cost

Question 5

Earned Value (EV)

Answer 5

EV = % Complete x BAC BAC = Budget At Completion

Question 7

Estimate At Completion (EAC)

Answer 7

EAC = AC / % Complete EAC = BAC / CPI AC = Actual Cost BAC = Budget at Completion CPI = Cost Performance Index

Question 8

Estimate To Completion (ETC)

Answer 8

ETC = EAC - AC EAC = Estimate At Completion AC = Actual Cost

Question 9

Expected Monetary Value (EMV)

Answer 9

EMV = Impact X Probability

Question 11

Normal Distribution

Answer 11

1 sigma = 68.26% 2 sigma = 95.46% 3 sigma = 99.73% 6 sigma = 99.999%

Question 12

Planned Value (PV)

Answer 12

PV = SV / (SPI - 1) SV = Schedule Variance SPI = Schedule Performance Index

Question 13

Present Value (PV)

Answer 13

PV = FV / (1 + r)n FV = Future Value r = Rate of Interest n = Number of Years

Question 14

Program Evaluation and Review Technique (PERT)

Answer 14

PERT = (O+4M+P) / 6

O = Optimistic P = Pessimistic M = Most Likely

Question 15

Schedule Performance Index (SPI)

Answer 15

SPI = EV / PV (>1) EV = Earned Value PV = Planned Value

Question 15

Qualitative Risk Score

Answer 15

Qualitative Risk Score = Probability x (Scope + Time + Cost + Quality)

Question 16

Schedule Variance (SV)

Answer 16

SV = EV - PV (>0) EV = Earned Value PV = Planned Value

Question 18

Standard Deviation (SD) of Activity

Answer 18

SD = (P-O) / 6

O = Optimistic P = Pessimistic

Question 19

To Complete Performance Index (TCPI)

Answer 19

TCPI = Remaining Work / Remaining Budget TCPI = (BAC - EV) / (BAC - AC) TCPI = (BAC - EV) / (EAC - AC) BAC = Budget At Completion EAC = Estimate At Completion EV = Earned Value AC = Actual Cost

Question 20

Variance at Completion (VAC)

Answer 20

VAC = BAC - EAC BAC = Budget at Completion EAC = Estimate at Completion

Question 21

Variance of Activity

Answer 21

= (SD)²