The owner/operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received: $$\begin{array} { c c c }
\text { Job } & \begin{array} { c }
\text { Processing Time } \
\text { (hrs) }
\end{array} & \begin{array} { c }
\text { Due } \
\text { (hrs from now) }
\end{array} \
\text { W } & 4 & 4 \
\text { X } & 3 & 5 \
\text { Y } & 2 & 2 \
\text { Z } & 1 & 1
\end{array}$$
If he uses the shortest processing time first priority rule to schedule these jobs, what will be the average completion time?
A) 7.5 hours
B) 5 hours
C) 3 hours
D) 2.5 hours
E) 2 hours

Question

The owner/operator of the local franchise of Handyman, Inc., has four jobs to do today, shown in the order they were received: $$\begin{array} { c c c } 
\text { Job } & \begin{array} { c } 
\text { Processing Time } \
\text { (hrs) }
\end{array} & \begin{array} { c } 
\text { Due } \
\text { (hrs from now) }
\end{array} \
\text { W } & 4 & 4 \
\text { X } & 3 & 5 \
\text { Y } & 2 & 2 \
\text { Z } & 1 & 1
\end{array}$$
If he uses the shortest processing time first priority rule to schedule these jobs, what will be the average completion time?
A) 7.5 hours
B) 5 hours
C) 3 hours
D) 2.5 hours
E) 2 hours

Quizplus · Accepted Answer

The shortest processing time first rule schedules jobs in the order Z, Y, X, W. The completion times are 1, 3, 6, and 10 hours respectively. The average completion time is (1+3+6+10)/4 = 5 hours.

The Owner/operator of the Local Franchise of Handyman, Inc If He Uses the Shortest Processing Time First Priority Rule