The AOA network described by this table needs: $$\begin{array} { | l | l | }
\hline \text { Activity } & \text { Predecessor } \
\hline\mathrm {A } & - - \
\hline\mathrm { B} & - - \
\hline \mathrm { C } & \text { A, B } \
\hline \mathrm { D } & \mathrm { B } \
\hline \mathrm { E } & \mathrm { C } , \mathrm { D } \
\hline
\end{array}$$
A)Zero dummy activities.
B)One dummy activity.
C)Two dummy activities.
D)Three dummy activities.

Question

The AOA network described by this table needs: $$\begin{array} { | l | l | } 
\hline \text { Activity } & \text { Predecessor } \
\hline\mathrm {A } & - - \
\hline\mathrm { B} & - - \
\hline \mathrm { C } & \text { A, B } \
\hline \mathrm { D } & \mathrm { B } \
\hline \mathrm { E } & \mathrm { C } , \mathrm { D } \ 
\hline
\end{array}$$
A)Zero dummy activities.
B)One dummy activity.
C)Two dummy activities.
D)Three dummy activities.

Quizplus · Accepted Answer

To maintain the correct precedence relationships in an Activity-on-Arrow (AOA) network, a dummy activity is needed to distinguish between the different paths leading to an activity with multiple predecessors. In this case, a dummy activity is required to differentiate the paths leading to activity E from C and D, since C and D have different sets of predecessors. This ensures that the dependency of E on both C and D is accurately represented without implying incorrect dependencies.

The AOA Network Described by This Table Needs A)Zero Dummy Activities