Project Test Bank is composed of activities we will refer to as A,B,C,and D for convenience (and lack of creativity).Durations and precedence requirements are shown in the table.Each of these activities can be conveniently laddered into two sub-activities of equal duration,so activity C in the original project becomes two activities,C1 and C2,each of which lasts 7 days.The first half of each activity serves as the predecessor to its second half and the first half of the original following activity.What is the difference in the late start time for activity C in the original project and activity C1 in the laddered project? $$\begin{array} { | l | l | l | }
\hline \text { Activity } & \text { Length } & \text { Predecessor } \
\hline A & 10 & - \
\hline B & 18 & A \
\hline \text { C } & 14 & A \
\hline D & 20 & B , C \
\hline
\end{array}$$
A) 3
B) 5
C) 7
D) 9

Question

Project Test Bank is composed of activities we will refer to as A,B,C,and D for convenience (and lack of creativity).Durations and precedence requirements are shown in the table.Each of these activities can be conveniently laddered into two sub-activities of equal duration,so activity C in the original project becomes two activities,C1 and C2,each of which lasts 7 days.The first half of each activity serves as the predecessor to its second half and the first half of the original following activity.What is the difference in the late start time for activity C in the original project and activity C1 in the laddered project? $$\begin{array} { | l | l | l | } 
\hline \text { Activity } & \text { Length } & \text { Predecessor } \
\hline A & 10 & - \
\hline B & 18 & A \
\hline \text { C } & 14 & A \
\hline D & 20 & B , C \
\hline
\end{array}$$
A) 3
B) 5
C) 7
D) 9

Quizplus · Accepted Answer

In the original project, the late start time for activity C would be 10 (after activity A). 
In the laddered project, the late start time for activity C1 would also be 10, since it is still a sub-activity of C and has the same predecessor. 
However, the late start time for activity C2 would be 17 (7 days for C1 + 10 days for A), since it starts after C1 and the first half of activity D. 
Therefore, the difference in the late start time for activity C in the original project and activity C1 in the laddered project is 0, since they have the same late start time.

Project Test Bank Is Composed of Activities We Will Refer