## Relation between CPI and TCPI

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anurag1720
Posts: 1
Joined: Sat Apr 01, 2017 3:46 pm

### Relation between CPI and TCPI

Hi,

I want to start a thread for discussing relation between CPI and TCPI. I came across an exam question where I was asked to demonstrate relation between CPI and TCPI. So the question goes if the project is 50% complete and current CPI is 0.75. What is the TCPI? According to my calculations which I am demonstrating below the answer comes out to be 1.51 but the correct answer is 1.25.

Since project is 50% complete EV = 0.5 * BAC

CPI = 0.75 => AC = (EV/0.75) = (0.5 * BAC)/(0.75) = 0.67 * BAC

TCPI = (BAC-EV)/(BAC-AC) = (BAC - 0.5 * BAC)/(BAC - 0.67 * BAC) = 1.51
barnita_n
Posts: 16
Joined: Thu Mar 02, 2017 2:29 pm

### Re: Relation between CPI and TCPI

My Calculation:

EV = .5BAC

EV/AC= .75 , AC = EV/.75=.5BAC/.75=BAC*.666

TCPI = BAC-EV/BAC-AC = > (BAC -.5BAC ) / (BAC--.666BAC)

TCPI = .5/.4 = 1.25
nazrulq
Contributor
Posts: 276
Joined: Sun Feb 26, 2017 6:06 am

### Re: Relation between CPI and TCPI

1st Answer is also correct which is 1.51.
Since its a rounded up number .4
PMP Exam question answer should be accurate.

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