PMP Math Questions - Expert Please suggest

I am putting the formulas together so it will help everyone. I started putting together but than found out PMZilla already had listed formulas, so copy pasting that here to review the latest ones Experts and everyone who has given exams, please add to this.


 


 







































































































1. PERT


(P + 4M + O )/ 6 Pessimistic, Most Likely, Optimistic


2. Standard Deviation


(P - O) / 6


3. Variance


[(P - O)/6 ]squared


4. Float or Slack


LS-ES and LF-EF


5. Cost Variance


EV - AC


6. Schedule Variance


EV - PV


7. Cost Perf. Index


EV / AC


8. Sched. Perf. Index


EV / PV


9. Est. At Completion (EAC)


BAC / CPI,


AC + ETC -- Initial Estimates are flawed


AC + BAC - EV -- Future variance are Atypical


AC + (BAC - EV) / CPI -- Future Variance would be typical


10. Est. To Complete


Percentage complete


EAC - AC


EV/ BAC


11. Var. At Completion


BAC - EAC


12. To Complete Performance Index TCPI


Values for the TCPI index of less then 1.0 is good because it indicates the efficiency to complete is less than planned. How efficient must the project team be to complete the remaining work with the remaining money?


( BAC - EV ) / ( BAC - AC )


13. Net Present Value


Bigger is better (NPV)


14. Present Value PV


FV / (1 + r)^n


15. Internal Rate of Return


Bigger is better (IRR)


16. Benefit Cost Ratio


Bigger is better ((BCR or Benefit / Cost) revenue or payback VS. cost)


Or PV or Revenue / PV of Cost


17. Payback Period


Less is better


Net Investment / Avg. Annual cash flow.


18. BCWS


PV


19. BCWP


EV


20. ACWP


AC


21. Order of Magnitude Estimate


-25% - +75% (-50 to +100% PMBOK)


22. Budget Estimate


-10% - +25%


23. Definitive Estimate


-5% - +10%


24. Comm. Channels


N(N -1)/2


25. Expected Monetary Value


Probability * Impact


26. Point of Total Assumption (PTA)


((Ceiling Price - Target Price)/buyer's Share Ratio) + Target Cost


Sigma σ



  • 1σ = 68.27%

  • 2σ = 95.45%

  • 3σ = 99.73%

  • 6σ = 99.99985%

Return on Sales ( ROS )
 


Net Income Before Taxes (NEBT) / Total Sales OR


Net Income After Taxes ( NEAT ) / Total Sales


Return on Assets( ROA )
 


NEBT / Total Assets OR


NEAT / Total Assets


Return on Investment ( ROI )


NEBT / Total Investment OR


NEAT / Total Investment


Working Capital


Current Assets - Current Liabilities


Discounted Cash Flow


Cash Flow X Discount Factor


Contract related formulas


Savings = Target Cost – Actual Cost

Bonus = Savings x Percentage

Contract Cost = Bonus + Fees

Total Cost = Actual Cost + Contract Cost


 


Please add typical, atypical and please correct if anything is wrong above so we can make a good list for everyone