Confused with diff formulas for EAC and ETC

Submitted by Sree on Mon, 02/25/2013 - 10:17

Hi All ,


Im aware that for finding Estimate at completion i have 4 diff formula


** EAC ***


1. EAC = BAC \ CPI       : no veriances
2. EAC = AC - ETC        : Original Estimates were flawned
3. EAC = AC+(BAC-EV)     : ATYPICAL
4. EAC = AC+(BAC-EV)/CPI : TYPICAL


** ETC ***


1. ETC = EAC-AC
2. ETC = BAC-EV         :- TYPICAL
3. ETC = BAC-EV / CPI   :- ATYPICAL


 


My concern is that im not able to relate these formula with the question that i do in the mock exams.Im not sure about the context these formulas are used . Specifically not sure abt the TYPICAL and NON typical .


Can some one explain to me please


Thanks in advance
Sree


 

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jamilur

Mon, 02/25/2013 - 10:39

check  following link

http://pmzilla.com/when-use-which-eac-formuala

I had same confusion.

http://pmzilla.com/forecasting-control-cost

Sree

Mon, 02/25/2013 - 10:54

Thank you .

raza82

Mon, 02/25/2013 - 18:43

check this explaination, it will open up your mind

 

http://www.deepfriedbrainproject.com/2009/09/estimate-at-completion-eac-...

deepfriedbrain

Wed, 06/21/2017 - 18:54

Hi,

The link above has a trailing slash which is breaking it. Here's the correct link:

http://www.deepfriedbrainproject.com/2009/09/eac-vs-etc-estimate-at-completion-formulas.html

 

cnppmp's picture

cnppmp

Tue, 06/04/2013 - 11:32

try resolving questions on www.scribd.com  (101 mathematical questions). More practice on similar questions on EV would help you in memorizing these and helps you to understand the concepts. The answer section on EV related questions provides an explanation on on several EAC and ETC formulas and when it should be used.


Better start working on those questions and let me know if works for you.


Note: if you try to memorixe just like that it will more confusing for you better get your hands on the questions first.


 


Regards


 


CN Patil

wmclemore

Wed, 06/05/2013 - 12:46

Interested in finding the 101 mathematical questions on www.scribd.com but having a hard time locating. Can you provide me with a little more information to help me locate this.


Thanks.

cnppmp's picture

cnppmp

Wed, 06/05/2013 - 15:48

http://www.scribd.com/doc/28680971/101-PMP-Sample-Questions-for-the-PMP-Exam


Regards


CN Patil

9srikant@gmail.com

Sat, 07/04/2015 - 17:19

Hi,

There is no document in above scribd link. Could you please email me the 101 formula document to 9srikant@gmail.com.

greatly appreciate ur response.

 

thanks

 

sri

josulliv

Mon, 07/06/2015 - 04:52

CNP,  would you please e-mail 101 PMP math questions to me, also?  Thank you, Jo.

MANOJ RAMRAOJI ...

Wed, 06/05/2013 - 16:40

BAC=EV+ETC

EAC;

1. WHEN THERE IS FLAW IN ORIGINAL ESTIMATE, EAC=AC+ETC

2.WHEN THERE IS NO VARIENCE FROM BAC, EAC=BAC/CPI

3. TO CALCULATE ACTUAL BASED ON REMAINING BUDGET, EAC= AC+(BAC-EV)

cnppmp's picture

cnppmp

Wed, 06/05/2013 - 17:14

 


EAC Calcualtions for different scenario:



  • No variances from the BAC have occurred or are expected to continueat the same rate of spending: EAC=BAC/CPI.(This is the formula most often required on the exam.)

  • Original estimate was fundamentally flawed or conditions havechanged and invalidated original estimating assumptions: EAC =AC+ETC

  • Current variances are thought to be atypical in the future. EAC =AC+BAC-EV (Though variances found but it will be on budget)

  • Current variances are thought to be typical in the future. EAC =AC+((BAC-EV) / CPI) (The variances continue)

ETC Calcualtions for different scenario:



  • ETC = EAC-AC - Expected total cost minus actual cost to date. Resultis a monetary value that will tell us how much more the project willcost.

  •  ETC = BAC-EV - The planned budget minus the earned value. Resultis a monetary value that will tell us how much more the project willcost. Assumption: use formula if current variances are thought to beatypical in the future.

  •  ETC = (BAC-EV) / CPI - The planned budget minus the earned valuemodified by project performance. Result is a monetary value that willtell us how much more the project will cost. Assumption: use formula if current variances are thought to be typical in the future

The essence of getting right in exam is work out on these practice questions as much as possible, so you find very easy going in real exam and you need not memorize these formulas..


http://www.scribd.com/doc/28680971/101-PMP-Sample-Questions-for-the-PMP-Exam


Regards


CN Patil

pmalik

Sun, 06/25/2017 - 10:29

Estimate At Completion (EAC) and Estimate To Complete (ETC) are one of the most confusing concepts of PMP Exam. The aspirants find them consfusing because most books concentrate on listing the formulas rather than giving explanation of the EVM concepts.

I have explained EAC and ETC concepts in the folliwing articles. I have not limited myself in just listing down the forumulas. I have also explained the scenarios where & how these formulas could be used. After reading these articles, you would be able to answer PMP questions confidently.

3 Estimate To Complete Formulas

5 Estimate At Completion Formulas

Good luck.