A project is represented by the activity durations (estimated at 90% likelihood of completion)and precedence requirements shown in the table.What is the overall duration of this project if it is managed using critical chain methodology? $\begin{array}{|l|l|l|l|l|l|}
\hline \text { Activity } & \text { Predecessor } & \text { Length } & \text { Activity } & \text { Predecessor } & \text { Length } \
\hline \mathrm{M} & - & 8 &\mathrm{R} & -- & 12 \
\hline \mathrm{N} & - & 8 & \mathrm{~S} & \mathrm{P} & 14 \
\hline \mathrm{P} & \mathrm{M} & 12 & \mathrm{~T} & \mathrm{R}, \mathrm{Q} & 7 \
\hline \mathrm{Q} & \mathrm{N} & 10 & \mathrm{~V} & \mathrm{~S}, \mathrm{~T} & 11\
\hline
\end{array}$

A)22.5
B)24.75
C)27.0
D)33.75

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 overall duration of this project if it is managed using critical chain methodology? $\begin{array}{|l|l|l|l|l|l|}
\hline \text { Activity } & \text { Predecessor } & \text { Length } & \text { Activity } & \text { Predecessor } & \text { Length } \
\hline \mathrm{M} & - & 8 &\mathrm{R} & -- & 12 \
\hline \mathrm{N} & - & 8 & \mathrm{~S} & \mathrm{P} & 14 \
\hline \mathrm{P} & \mathrm{M} & 12 & \mathrm{~T} & \mathrm{R}, \mathrm{Q} & 7 \
\hline \mathrm{Q} &  \mathrm{N} & 10 & \mathrm{~V} & \mathrm{~S}, \mathrm{~T} & 11\
\hline 
\end{array}$

A)22.5
B)24.75
C)27.0
D)33.75

Quizplus · Accepted Answer

The critical chain methodology focuses on the longest sequence of dependent activities and considers resource constraints, leading to a different project duration than traditional methods. To find the overall duration, identify the longest path through the project, considering dependencies. The longest path is M -> P -> S -> V, with durations of 8 + 12 + 14 + 11 = 45. However, critical chain methodology also accounts for buffers, typically reducing the estimated durations. Without specific buffer information, we assume the given durations are already adjusted for a 90% likelihood of completion, making further adjustments unnecessary for this question. Thus, the total duration is the sum of the longest path, which is 45, not matching any of the provided options directly. However, given the context of the question and the options provided, it seems there might be a misunderstanding in interpreting the methodology or a mistake in the question setup. The correct approach involves calculating the longest path correctly and adjusting for buffers if detailed information is provided. Since none of the options match the calculated duration and assuming a potential misinterpretation, the focus should be on understanding the critical chain methodology's impact on project duration.

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