The following jobs are waiting to be processed at Rick Solano's machine center. Solano's machine center has a relatively long backlog and sets a fresh schedule every 2 weeks, which does not disturb earlier schedules. Below are the jobs to be scheduled today, which is day 241 (day 241 is a work day). Job names refer to the names of clients and contract numbers. Compute all times based on initiating work on day 241.

Job	Date Job Received	Due Date	Duration (days)
BR02	230	320	35
CX01	235	360	40
DE06	231	310	30
RG05	228	300	15
SY11	225	270	25

a) 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

Part 2

2

Part 3

3

Part 4

4

Part 5

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

days (round your response to two decimal places).

Part 6

The average completion time (flow time) for the sequence developed using the FCFS rule =

days (round your response to two decimal places).

Part 7

The percentage utilization for the sequence developed using the FCFS rule =

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

Part 8

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

Part 9

2

Part 10

3

Part 11

4

Part 12

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

days (round your response to two decimal places).

Part 13

The average completion time (flow time) for the sequence developed using the SPT rule =

days (round your response to two decimal places).

Part 14

The percentage utilization for the sequence developed using the SPT rule =

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

Part 15

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

Part 16

2

Part 17

3

Part 18

4

Part 19

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

days (round your response to two decimal places).

Part 20

The average completion time (flow time) for the sequence developed using the LPT rule =

days (round your response to two decimal places).

Part 21

The percentage utilization for the sequence developed using the LPT rule =

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

Part 22

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

Part 23

2

Part 24

3

Part 25

4

Part 26

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

days (round your response to two decimal places).

Part 27

The average completion time (flow time) for the sequence developed using the EDD rule =

days (round your response to two decimal places).

Part 28

The percentage utilization for the sequence developed using the EDD rule =

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

Part 29

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

Sequence	Job
1

Part 30

2

Part 31

3

Part 32

4

Part 33

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

days (round your response to two decimal places).

Part 34

The average completion time (flow time) for the sequence developed using the CR rule =

days (round your response to two decimal places).

Part 35

The percentage utilization for the sequence developed using the CR rule =

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

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: