Maths may be an addiction

Submitted by sspawar on Sun, 08/12/2012 - 03:26

PMP asks only around 10% maths questions of simple to moderate level but highly conceptual.
Don't addict of maths for puzzled like questions if comes ahead of you.
Might be they may drag in to the deep.

Here is a question like a PUZZLE, by no doubt a conceptual, PMP does not follow such questions but --- few like such:

63. A task was scheduled to use two persons, full time, and take two weeks to complete. Instead, the project manager was only able to assign one person to this task. At the end of two weeks, the person assigned to the task was 75% complete. What is the cost performance index?
a. 0.75
b. 1.50
c. 1.33
d. 0.50

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greengovinda

Sun, 08/12/2012 - 12:52

Please reword whatever you are trying to explain. You are not communicating properly. Please reword:


 


"


Don't addict of maths for puzzled like questions if comes ahead of you.
Might be they may drag in to the deep.


Here is a question like a PUZZLE, by no doubt a conceptual, PMP does not follow such questions but --- few like such:


"

sspawar

Sun, 08/12/2012 - 14:36

actually there are variety of people on forum few like to go in deep to understand any type of problem like difficult, or not oftenly relevant, they want to be through.

few may disappoint , their strategy may be slight more realstic with the exam point of view are as per their own rule of command on subject in all.

so my message is very clear , in all situation be  firm , with your strategy, problems level is according to your choice.

let me tell in easy word:

this coffee is too hot and hard or this coffee is too creamy and milky, or sweet,

choice is up to you if you like it have it ! otherwise leave it its not a benchmark you may enjoy a green leaf tea.

diba_perfect

Sun, 08/12/2012 - 15:35

Pawarji,

I think your follow up explanation is even more difficult to understand than the first post.

~ Diba

sspawar

Sun, 08/12/2012 - 17:44

Don't addict of maths for puzzled like questions if comes ahead of you.
Might be they may drag in to the deep.=

here just it is my opinion that during study if you find such question( hard or tough question) may be avoided. Sometimes such q's may kill your valuable time.You may learn in deep but not will be fruitful as much you spend your time energy and money.

Here is a question like a PUZZLE, by no doubt a conceptual, PMP does not follow such questions but --- few like such=

below question by concept point of view , no doubt a highly conceptual. But very tough to dig out, PMP does not ask such quize type questions. But many of us want be through and like to solve them.

If I had asked simply - (without these comments), some people may criticise, some may feel disapointed.

sspawar

Sun, 08/12/2012 - 17:41

I found this question from DEEPFRIEDBRAIN - HARWINDER'S Blog, one gentleman has asked this question in feb 2010 to HARVINDER, but he cant replied it.

though later blog discussion, had been succeed to reach to the explanation,but not truly (fully) while answer is available at -

https://sites.google.com/site/pmpbank/61-80, without explanation,.

q no 17,37,54,81,and 165 are also asked in same blog, but not replied. Q 37 has already been explained by me in other post recently as asked 2wice in this forum.

aliweb

Tue, 08/14/2012 - 11:27

Yes it's a very logical question. Main problem that people face with it is that the question is asking about CPI but there is no mention of cost. So how do we calculate CPI without cost? We have to assume it considering all things being equal i.e. all persons working on this project are equal in cost.

Let's say 1 person costs $1/week.

Therefore PV of this project becomes:

PV = $4 (because there are two persons working 2 weeks)

Since only one person worked on project therefore actual cost becomes:

AC = $2 (worked 2 weeks)

As you can see the project is only 75% complete hence you need to calculate 75% of PV and you will have your EV:

EV = $3

Now we know CPI formula:

CPI = EV / AC

CPI = 3/2

CPI = 1.5

sspawar

Wed, 08/15/2012 - 08:03

Yes, it is very logical question.

Everything is valid in question.

Examplary way to solve the problem is quite good to understand and to reach to the correct answer.

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I like to solve in this way:

One task - have  a BAC = 100% of an amount

75% done means - at a point of time (2 weeks) it is an EV = 75% of that amount

2 people in 2 weeks do it complete =100%, will charge an amount is a EV=PV =BAC=100%

One person in 2 week do it 75% , will charge definitely 50% of above (his wages) , hence AC =50%

CPI = EV/AC = 0.75/0.50 = 1.5.whereas PV  = 0.75/1.00 = 0.75

Its a classic example.

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thanks Ali

 

 

amber

Mon, 08/27/2012 - 18:19

 thanks for detailed explanation, i did same way till EV=3 calculation, then got confused regarding how to calculate AC, but now it got cleared. 

projmanpro

Wed, 08/29/2012 - 07:41

Dudes,

wheeeewww... i was offline for a couple of months... i got some long vacation away from my pad.

Anyways, about the question ---- your answer guys is CPI = 1.5 (positive vlaue)  - what does it mean? does it mean - the progress in terms of cost is good? that the manager had some savings?

Does the question state the same scenario?

(just for brainstorming)