A Manufacturer Has the Following Jobs Waiting on a Single

question 57

Essay

A manufacturer has the following jobs waiting on a single work center. The firm has not decided which dispatching rule to apply in order to prioritize the jobs and fix them into the schedule. Processing time in 15-minute time blocks and due date for each job are in the table below.
$$\begin{array} { | c | c | c | } \hline & \text { Time } & \text { Due Date } \\\hline \text { Job 1 } & 5 & 17 \\\hline \text { Job 2 } & 4 & 20 \\\hline \text { Job 3 } & 3 & 16 \\\hline \text { Job 4 } & 7 & 9 \\\hline \text { Job 5 } & 3 & 6 \\\hline \text { Job 6 } & 5 & 7 \\\hline\end{array}$$
a. Complete the following table. Show your supporting calculations below.
b. Which dispatching rule has the best score for flow time?
for work in process (jobs in the system)?
for lateness?
c. Is there ANY sequence that can avoid all lateness?
Explain or provide an example.
$\begin{array}{|l|l|l|l|l|}\hline&&&\text { Average }\\\text { Dispatching } & & \text { Average } & \text { Number of } & \text { Average } \\\text { Rule } & \text { Tob Sequence } & \text { Flow Time } & \text { Jobs } & \text { Lateness } \\\hline \text { EDD } & \\\hline \text { SPT } & \\\hline \text { LPT } &\\\hline\end{array}$

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Definitions:

Indigestible Substances

Materials that cannot be broken down and absorbed by the digestive enzymes and system of an organism, often passing through the system largely unchanged.

Entropy

Measure of how much the energy of a system is dispersed.

Energy Conversion

The process of changing one form of energy into another, such as solar energy into electricity.

Increasing Entropy

The process by which the disorder or randomness in a system increases, often associated with the second law of thermodynamics.