A project is represented by the activity durations (estimated at 90% likelihood of completion)and precedence requirements shown in the table.What is the length of the feeder buffer for path NQT if this project is managed using critical chain methodology?
A)9.0
B)2.25
C)4.5
D)6.75

Question

A project is represented by the activity durations (estimated at 90% likelihood of completion)and precedence requirements shown in the table.What is the length of the feeder buffer for path NQT if this project is managed using critical chain methodology? 
A)9.0 
B)2.25 
C)4.5 
D)6.75

Quizplus · Accepted Answer

The critical chain methodology includes the addition of a buffer to protect the project completion date from potential delays. The length of the feeder buffer can be calculated by subtracting the duration of the critical chain from the duration of the project. The critical chain for this project is N-Q-T, with a duration of 36.75 days. The total project duration is 45 days. Therefore, the length of the feeder buffer for path N-Q-T is 45 - 36.75 = 8.25 days. However, the question specifically asks for the length of the feeder buffer for path N-Q-T, which includes activity R. Since activity R is not on the critical chain, its duration can be discounted from the feeder buffer calculation. The duration of activity R is 6 days, so the length of the feeder buffer for path N-Q-T is 8.25 - 6 = 2.25 days. Therefore, the correct answer is B.

A Project Is Represented by the Activity Durations (Estimated at 90