Jack's Refrigeration Repair is under contract to repair, recondition, and/or refurbish commercial and industrial icemakers from restaurants, seafood processors, and similar organizations. Jack currently has five jobs to be scheduled, shown in the order in which they arrived.
$$\begin{array} { | c | c | c | }
\hline \text { Job } & \text { Processing Time (hours) } & \text { Due (hours) } \
\hline \mathrm { V } & 20 & 50 \
\hline \mathrm { W } & 10 & 35 \
\hline \mathrm { X } & 50 & 90 \
\hline \mathrm { Y } & 15 & 35 \
\hline \mathrm { Z } & 55 & 75 \
\hline
\end{array}$$
a. Complete the following table. (Show your supporting calculations below).
b. Which dispatching rule has the best score for flow time?
c. Which dispatching rule has the best score for work-in-process (jobs in the system)?
d. Which dispatching rule has the best score for lateness?
e. What dispatching rule would you select?
Support your decision.
$\begin{array}{|c|c|c|c|c|}
\hline\begin{array}{c}
\text { Dispatching } \
\text { Rule }
\end{array} & \text { Job Sequence } & \begin{array}{c}
\text { Average Flow } \
\text { Time }
\end{array} & \begin{array}{c}
\text { Average } \
\text { Number of } \
\text { Jobs }
\end{array} & \begin{array}{c}
\text { Average } \
\text { Lateness }
\end{array} \
\hline \text { FCFS } & \
\hline \text { SPT } & \
\hline \text { EDD } & \
\hline \text { CR } & \
\hline
\end{array}$

Question

Jack's Refrigeration Repair is under contract to repair, recondition, and/or refurbish commercial and industrial icemakers from restaurants, seafood processors, and similar organizations. Jack currently has five jobs to be scheduled, shown in the order in which they arrived.
 $$\begin{array} { | c | c | c | } 
\hline \text { Job } & \text { Processing Time (hours) } & \text { Due (hours) } \
\hline \mathrm { V } & 20 & 50 \
\hline \mathrm { W } & 10 & 35 \
\hline \mathrm { X } & 50 & 90 \
\hline \mathrm { Y } & 15 & 35 \
\hline \mathrm { Z } & 55 & 75 \
\hline
\end{array}$$ 
a. Complete the following table. (Show your supporting calculations below).
b. Which dispatching rule has the best score for flow time?
c. Which dispatching rule has the best score for work-in-process (jobs in the system)?
d. Which dispatching rule has the best score for lateness?
e. What dispatching rule would you select?
 Support your decision.
 $\begin{array}{|c|c|c|c|c|}
\hline\begin{array}{c}
\text { Dispatching } \
\text { Rule }
\end{array} & \text { Job Sequence } & \begin{array}{c}
\text { Average Flow } \
\text { Time }
\end{array} & \begin{array}{c}
\text { Average } \
\text { Number of } \
\text { Jobs }
\end{array} & \begin{array}{c}
\text { Average } \
\text { Lateness }
\end{array} \
\hline \text { FCFS } & \
\hline \text { SPT } & \
\hline \text { EDD } & \
\hline \text { CR } & \
\hline
\end{array}$

Quizplus · Accepted Answer

The Answer of Jack's Refrigeration Repair is under contract to repair, recondition, and/or refurbish commercial and industrial icemakers from restaurants, seafood processors, and similar organizations. Jack currently has five jobs to be scheduled, shown in the order in which they arrived.
 $$\begin{array} { | c | c | c | } 
\hline \text { Job } & \text { Processing Time (hours) } & \text { Due (hours) } \
\hline \mathrm { V } & 20 & 50 \
\hline \mathrm { W } & 10 & 35 \
\hline \mathrm { X } & 50 & 90 \
\hline \mathrm { Y } & 15 & 35 \
\hline \mathrm { Z } & 55 & 75 \
\hline
\end{array}$$ 
a. Complete the following table. (Show your supporting calculations below).
b. Which dispatching rule has the best score for flow time?
c. Which dispatching rule has the best score for work-in-process (jobs in the system)?
d. Which dispatching rule has the best score for lateness?
e. What dispatching rule would you select?
 Support your decision.
 $\begin{array}{|c|c|c|c|c|}
\hline\begin{array}{c}
\text { Dispatching } \
\text { Rule }
\end{array} & \text { Job Sequence } & \begin{array}{c}
\text { Average Flow } \
\text { Time }
\end{array} & \begin{array}{c}
\text { Average } \
\text { Number of } \
\text { Jobs }
\end{array} & \begin{array}{c}
\text { Average } \
\text { Lateness }
\end{array} \
\hline \text { FCFS } & \
\hline \text { SPT } & \
\hline \text { EDD } & \
\hline \text { CR } & \
\hline
\end{array}$

Jack's Refrigeration Repair Is Under Contract to Repair, Recondition, And/or