A Firm That Specializes in Desktop Publishing for Local Charities

question 42

Essay

A firm that specializes in desktop publishing for local charities has agreed to take on the following jobs. The firm has not decided which dispatching rule to apply in order to prioritize the jobs and fix them into the schedule. All dates are specified as days from Day 1.
$$\begin{array} { | r | r | r | r | } \hline \text { Start day } & 1 & & \\\hline \text { Data } & & & \\\hline & \text { Received } & \text { Time } & \text { Due Date } \\\hline \text { A } & 1 & 23 & 19 \\\hline \text { B } & 1 & 18 & 33 \\\hline \text { C } & 1 & 6 & 15 \\\hline \mathrm { D } & 1 & 11 & 54 \\\hline \text { E } & 1 & 12 & 14 \\\hline \text { F } & 1 & 4 & 29 \\\hline\end{array}$$ 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?
$$\begin{array} { | l | l | l | l | l | } \hline \begin{array} { l } \text { Dispatching } \\\text { Rule }\end{array} & \begin{array} { l } \text { Average } \\\text { Flow Time }\end{array} & \begin{array} { l } \text { Average Number } \\\text { of Jobs }\end{array} & \begin{array} { l } \text { Number of } \\\text { Jobs Late }\end{array} & \begin{array} { l } \text { Average } \\\text { Lateness }\end{array} \\\hline \text { FCFS } & & & & \\\hline \text { SPT } & & & & \\\hline\text { LPT } & & & & \\\hline \text { EDD } & & & & \\\hline \text { SLACK } & & & & \\\hline \text { CR } & & & &\\\hline\end{array}$$

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Definitions:

Urinary Laboratory

A diagnostic room or department where urine samples are analyzed for medical purposes.

Specific Gravity

A measure of the density of a substance compared to the density of water.

Reflex Incontinence

A type of urinary incontinence where involuntary urination occurs due to a reflex without the sensation of needing to urinate.

Urge Incontinence

A type of urinary incontinence that results from sudden, involuntary contraction of the muscles of the urinary bladder, resulting in an urge to urinate.