Using the FCFS$($first come, first$$ served$)$ decision rule for sequencing the$$ jobs, the order is$($assume that jobs came in the order in which they are listed in the$$ table$)$:

Sequence

Job

$1$

$$

D

B

A

C

$2$

$$

D

C

B

A

$3$

$$

B

C

A

D

$4$

$$

D

A

B

C

$$b$)$ Using the SPT$($shortest processing$$ time$)$ decision rule for sequencing the$$ jobs, the order is$($to resolve a$$ tie, use the order in which the jobs were$$ received$)$:

Sequence

Job

$1$

$$

D

C

A

B

$2$

$$

C

A

B

D

$3$

$$

B

A

D

C

$4$

$$

D

C

A

B

$$c$)$ Using the LPT$($longest processing$$ time$)$ decision rule for sequencing the$$ jobs, the order is$($to resolve a$$ tie, use the order in which the jobs were$$ received$)$:

Sequence

Job

$1$

$$

A

B

C

D

$2$

$$

C

B

D

A

$3$

$$

B

A

C

D

$4$

$$

B

D

C

A

$$d$)$ Using the EDD$($earliest due$$ date$)$ decision rule for sequencing the$$ jobs, the order is$($to resolve a$$ tie, use the order in which the jobs were$$ received$)$:

Sequence

Job

$1$

$$

A

C

B

D

$2$

$$

B

D

A

C

$3$

$$

A

D

B

C

$4$

$$

C

A

B

D

$$e$)$ Using the Critical Ratio$($CR$)$ scheduling rule for sequencing the$$ jobs, the order$$ is:

Sequence

Job

$1$

$$

A

D

B

C

$2$

$$

A

B

C

D

$3$

$$

D

C

A

B

$4$

$$

D

A

B

C

$.$

$.$

$.$

Question content area right

Part $1$

An Alabama lumberyard has four jobs on$$ order, as shown in the following table. Today is day $205$ on the$$ yard's schedule. In what sequence would the jobs be ranked according to the decision rules on the$$ left:

$$

Job

Due Date

Duration$($days$)$

Upper A

$209$

$3$

Upper B

$208$

$4$

Upper C

$210$

$8$

Upper D

$212$

$5$

All dates are specified as manufacturing planning calendar days. Assume that all jobs arrive on day $205.$ Compute all times based on initiating work on day $205.$

Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$Compute all times based on initiating work on day $205.$