TOPIC: PM Formulas

Hi
I purchased the 105 Formula Questions.
I'm looking to clarify the answer to question No.73. The answer given is A) 486,300. When I calculate using the correct formulas I get an answer of CPI = 240,000 / 253,700 = 0.9459. Is this ratio that added to the nearest decimal point, i.e. 0.95 ??
Using the answers ratio of 0.946 EAC = 700,000 / 0.946 = 739,957.716
• ETC = EAC – AC = 739,958 – 253,700 = 486,258
If you round off 0.946 to 0.95 you get EAC = 700,000 / 0.95 = 736,842,10
• ETC = EAC – AC = 736,842 – 253,700 = 483,142

Regards
Damien

Hi Damien,

I didn't have the question so I took the long route but basically if you use CPI with more decimal places the answer works out. As you noticed rounding the CPI up even one decimal place makes a fairly large difference in the final answer.

You mentioned CPI = 240,000 / 253.700 so that tells me the question gives you the EV as 240,000 and AC as 253,700
You mentioned EAC = 700,000 / CPI which tells me that the question gives you BAC as 700,000
(I now know I didn't need to do that )

CPI = 240,000 / 253,700 = 0.945945945
EAC = BAC / CPI => 700,000 / 0.945945945 => 740,000.00074
ETC = EAC - AC => 740,000.00074 - 253,700 => 486,300.00074 => 486,300

pls advice where you gotten the 105 formula qns?
I would like to practice. kindly email me This email address is being protected from spambots. You need JavaScript enabled to view it.

Hi Aishah,

You can purchase the formulas and the 105 sample questions here.
https://www.project-management-prepcast.com/pmp-exam/the-pm-formulas