Time management: Lag and Buffer

Submitted by al.zo on Thu, 03/21/2013 - 13:55

 Hi Experts,

 

I met the following question:

 

If a project manager wants to schedule a delay between activities in a project plan, he/she uses:

a. Float

b. Lag

c. Buffer

d. Lead

 

I answered b. but the solution showed c. as correct answer.

Is it really correct?

 

 

 

 

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bpatel

Thu, 03/21/2013 - 14:08

That's what i dont like about this whole thing


Based on our reading we will of course think 'Lag', but Buffer is also a correct answer.


I hope they dont have difficult questions in my exam.


At first look i answered Lag, but buffer is also not an incorrect choice as Buffer can definitely introduce delays.

al.zo

Thu, 03/21/2013 - 14:14

Buffers are designed quantities of time, sized and applied to a project schedule to protect what is important to the success of that project.  Buffers are non-work schedule activities to manage uncertainty.

 
 Lag time is the amount of a dependency.  It is the time you need to wait after the independent/predecessor task is finished, and before the dependent/successor task can start in a finish to start relationship.  Lag time pushes the dependent/successor task later in time thus increasing the end date of the network path.
 
it is not so clear to me.. both could be true

AP

Thu, 03/21/2013 - 14:58

The keyword in the question is schedule a delay.


Buffer is a time which a PM can introduce into a schedule to account for any uncertainities.


Whereas lag is not introduced, but it is evolved as a result of dependancy between activities.

al.zo

Thu, 03/21/2013 - 18:20

thanks a lot AP