A project is represented by the activity durations (in days,estimated at 90% likelihood of completion)and precedence requirements shown in the table.How many feeder buffers are needed if this project is managed using critical chain methodology? $$\begin{array} { | l | l | l | l | l | l }
\hline \text { Activity } & \text { Predecessor } & \text { Lengenth } & \text { Activity } & \text { Predecessor } & \text { Length } \
\hline \text { A } & - - & 18 & \mathrm { E} & \mathrm { C }, \mathrm { D} & 13 \
\hline B & - & 16 & \mathrm { F} & \mathrm { C }& 9 \
\hline \mathrm { C } & \mathrm { A } & 22 & \mathrm {G} & \mathrm { E } , \mathrm { F } & 15 \
\hline \mathrm { D } & \mathrm { B } & 14 & & & \
\hline
\end{array}$$

A)0
B)1
C)2
D)3

Question

A project is represented by the activity durations (in days,estimated at 90% likelihood of completion)and precedence requirements shown in the table.How many feeder buffers are needed if this project is managed using critical chain methodology? $$\begin{array} { | l | l | l | l | l | l } 
\hline \text { Activity } & \text { Predecessor } & \text { Lengenth } & \text { Activity } & \text { Predecessor } & \text { Length } \
\hline \text { A } & - - & 18 &  \mathrm { E} &  \mathrm { C }, \mathrm { D} & 13 \
\hline B & - & 16 &  \mathrm { F} & \mathrm { C }& 9 \
\hline \mathrm { C } & \mathrm { A } & 22 & \mathrm {G} & \mathrm { E } , \mathrm { F } & 15 \
\hline \mathrm { D } & \mathrm { B } & 14 & & & \
\hline
\end{array}$$

A)0
B)1
C)2
D)3

Quizplus · Accepted Answer

Feeder buffers are added at the beginning of non-critical chains that feed into the critical chain. In this project, activities C and D start after A and B respectively, and both feed into activities E and F, which converge into G. Since activities E and F are dependent on the outputs of both C and D, and assuming the critical chain involves the longest path through the project, we identify two points where non-critical chains feed into the critical chain, necessitating two feeder buffers.

A Project Is Represented by the Activity Durations (In Days,estimated