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

question 68

Essay

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.
$$\begin{array} { | c | c | c | c | c | } \hline \begin{array} { c } \text { Dispatching } \\\text { Rule }\end{array} & \text { Job Sequence } & \begin{array} { c } \text { Average Flow } \\\text { Time }\end{array} & \begin{array} { c } \text { Average } \\\text { Number of } \\\text { Jobs }\end{array} & \begin{array} { c } \text { Average } \\\text { Lateness }\end{array} \\\hline \text { FCFS } & & & & \\\hline \text { SPT } & & & & \\\hline \text { EDD } & & & & \\\hline \text { CR } & & & & \\\hline\end{array}$$

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Definitions:

Assign the Lease

The process of transferring all or part of the rights and obligations of an existing lease from the original tenant to another party.

Voidable

Legally valid until annulled; a contract or agreement that can be legally declared invalid.

Liability

The state of being legally responsible for something, especially in terms of debts or legal obligations.

Commercial Lease Agreements

Legal contracts between a landlord and a business for the rental of property used for commercial activities.