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}

Flow Time Represents the Time

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