Table 3.3
$$\begin{array} { | c | c | c | }
\hline \text { Activity } & \begin{array} { c }
\text { Immediate } \
\text { Predecessor(s) }
\end{array} & \begin{array} { c }
\text { Time } \
\text { (weeks) }
\end{array} \
\hline \text { A } & \cdots & 3 \
\text { B } & \cdots & 3 \
\text { C } & \cdots & 3 \
\text { D } & \text { B } & 4 \
\text { E } & \text { A,C } & 4 \
\text { F } & \text { B } & 4 \
\text { G } & & \
\text { H } & \text { E } & 5 \
\text { I } & \text { E } & 5 \
\hline
\end{array}$$
-Using Table 3.3,what is the minimum number of activities that would have to be crashed in order to cause a decrease in the project's earliest completion date?
A) 1 activity
B) 2 activities
C) 3 activities
D) 4 or more activities

Question

Table 3.3
 $$\begin{array} { | c | c | c | } 
\hline \text { Activity } & \begin{array} { c } 
\text { Immediate } \
\text { Predecessor(s) }
\end{array} & \begin{array} { c } 
\text { Time } \
\text { (weeks) }
\end{array} \
\hline \text { A } & \cdots & 3 \
\text { B } & \cdots & 3 \
\text { C } & \cdots & 3 \
\text { D } & \text { B } & 4 \
\text { E } & \text { A,C } & 4 \
\text { F } & \text { B } & 4 \
\text { G } & & \
\text { H } & \text { E } & 5 \
\text { I } & \text { E } & 5 \
\hline
\end{array}$$
-Using Table 3.3,what is the minimum number of activities that would have to be crashed in order to cause a decrease in the project's earliest completion date?
A) 1 activity
B) 2 activities
C) 3 activities
D) 4 or more activities

Quizplus · Accepted Answer

Crashing an activity means reducing its duration to decrease the overall project duration. To determine the critical path, we use the forward and backward pass method. In this case, the critical path is A-E-H-I, with a duration of 16 weeks. Any activities on the critical path cannot be crashed without increasing the project duration. However, activities B, C, and F have a slack time of 1 week, which means they could potentially be crashed by 1 week each without affecting the project duration. Therefore, at least 2 activities need to be crashed to cause a decrease in the project's earliest completion date.

Table 33 -Using Table 3