) 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	A C B D

2

D C A B

3

A D B C

4

B C A D

The average tardiness (job lateness) for the sequence developed using the SPT rule =

enter your response here

days (round your response to two decimal places).The average completion time (flow time) for the sequence developed using the SPT rule =

enter your response here

days (round your response to two decimal places).The percentage utilization for the sequence developed using the SPT rule =

enter your response here%

(enter your response as a percentage rounded to two decimal places).

b) 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	C D B A

2

A B D C

3

B D A C

4

A B C D

The average tardiness (job lateness) for the sequence developed using the EDD rule =

enter your response here

days (round your response to two decimal places).The average completion time (flow time) for the sequence developed using the EDD rule =

enter your response here

days (round your response to two decimal places).The percentage utilization for the sequence developed using the EDD rule =

enter your response here%

(enter your response as a percentage rounded to two decimal places).

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

Sequence	Job
1	D A B C

2

B C D A

3

D A B C

4

C A B D

The average tardiness (job lateness) for the sequence developed using the CR rule =

enter your response here

days (round your response to two decimal places).The average completion time (flow time) for the sequence developed using the CR rule =

enter your response here

days (round your response to two decimal places).The percentage utilization for the sequence developed using the CR rule =

enter your response here%

(enter your response as a percentage rounded to two decimal places).

...

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)
A	209	3
B	208	4
C	210	8
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.