A project consists of five activities.Naturally the paint mixing precedes the painting activities.Also,both ceiling painting and floor sanding must be done prior to floor buffing.

$$\begin{array} { l c c c }
\text { Activity } & \begin{array} { c }
\text { Optimistic } \
\text { Time (hr) }
\end{array} & \begin{array} { c }
\text { Most Probable } \
\text { Time (hr) }
\end{array} & \begin{array} { c }
\text { Pessimistic } \
\text { Time (hr) }
\end{array} \
\hline \text { Floor sanding } & 3 & 4 & 5 \
\text { Floor buffing } & 1 & 2 & 3 \
\text { Paint mixing } & 0.5 & 1 & 1.5 \
\text { Wall painting } & 1 & 2 & 9 \
\text { Ceiling painting } & 1 & 5.5 & 7
\end{array}$$
a.Construct the PERT/CPM network for this problem.
b.What is the expected completion time of this project?
c.What is the probability that the project can be completed within 9 hr.?

Question

A project consists of five activities.Naturally the paint mixing precedes the painting activities.Also,both ceiling painting and floor sanding must be done prior to floor buffing.
​
 $$\begin{array} { l c c c } 
\text { Activity } & \begin{array} { c } 
\text { Optimistic } \
\text { Time (hr) }
\end{array} & \begin{array} { c } 
\text { Most Probable } \
\text { Time (hr) }
\end{array} & \begin{array} { c } 
\text { Pessimistic } \
\text { Time (hr) }
\end{array} \
\hline \text { Floor sanding } & 3 & 4 & 5 \
\text { Floor buffing } & 1 & 2 & 3 \
\text { Paint mixing } & 0.5 & 1 & 1.5 \
\text { Wall painting } & 1 & 2 & 9 \
\text { Ceiling painting } & 1 & 5.5 & 7
\end{array}$$ 
a.Construct the PERT/CPM network for this problem.
b.What is the expected completion time of this project?
c.What is the probability that the project can be completed within 9 hr.?

Quizplus · Accepted Answer

The Answer of A project consists of five activities.Naturally the paint mixing precedes the painting activities.Also,both ceiling painting and floor sanding must be done prior to floor buffing.
​
 $$\begin{array} { l c c c } 
\text { Activity } & \begin{array} { c } 
\text { Optimistic } \
\text { Time (hr) }
\end{array} & \begin{array} { c } 
\text { Most Probable } \
\text { Time (hr) }
\end{array} & \begin{array} { c } 
\text { Pessimistic } \
\text { Time (hr) }
\end{array} \
\hline \text { Floor sanding } & 3 & 4 & 5 \
\text { Floor buffing } & 1 & 2 & 3 \
\text { Paint mixing } & 0.5 & 1 & 1.5 \
\text { Wall painting } & 1 & 2 & 9 \
\text { Ceiling painting } & 1 & 5.5 & 7
\end{array}$$ 
a.Construct the PERT/CPM network for this problem.
b.What is the expected completion time of this project?
c.What is the probability that the project can be completed within 9 hr.?

A Project Consists of Five Activities AConstruct the PERT/CPM Network for This Problem