Use Johnson's Rule to Determine the Optimal Sequencing for the Five

question 7

Essay

Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2). The processing times in hours are given in the table below.
a. What is the optimal sequence?
b. What is the total flow time for this sequence?
c. Which job is the first to be scheduled? Is it scheduled to be the first job or the last? Explain.
$$\begin{array} { | c | c | c | } \hline \text { Job } & \text { Machine 1 } & \text { Machine 2 } \\\hline \text { A } & 10 & 11 \\\hline \text { B } & 8 & 17 \\\hline \text { C } & 14 & 10 \\\hline \text { D } & 13 & 7 \\\hline \text { E } & 10 & 8 \\\hline \text { F } & 25 & 9 \\\hline \text { G } & 6 & 15 \\\hline\end{array}$$

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Definitions:

Unconditioned Response

in classical conditioning, an unlearned, naturally occurring response (such as salivation) to anunconditioned stimulus (US) (such as food in the mouth).

Generalization

The process whereby a response is given to similar stimuli beyond the original stimulus learned.

Acquisition

In psychology, the phase of learning during which a response is established.

Acquiring

The act of obtaining ownership or control of something, often relating to assets or companies.