Currently a company that designs Web sites has five customers in its backlog. The time since the order arrived, processing time, and promised due dates are given in the following table. The customers are ready to be scheduled today, which is the start of day 190. Question Viewer Time Since Order Arrived Customer (days ago) Processing Time (days) Due Date (days from now) A 3 B 2 C 10 D E 8 6 22228 24 32 58 100 20 26 12 50 66 a. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average days past due. Using the FCFS (first come, first served) decision rule for sequencing the customers, the order is: Sequence 1 2 3 4 5 Customer C D E A B Using the EDD (earliest due date) decision rule for sequencing the customers, the order is (to resolve a tie, use the order in which the jobs were received): Sequence 1 2 3 4 5 Customer C D A E B The average flow time and average days past due for each option are: (Enter your responses rounded to one decimal place.) Rule EDD FCFS Average Flow Time Average Days Past Due

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter12: Queueing Models
Section: Chapter Questions
Problem 59P
Question
Currently a company that designs Web sites has five customers in its backlog. The time since the order arrived, processing time, and promised due dates are
given in the following table. The customers are ready to be scheduled today, which is the start of day 190.
Question Viewer
Time Since
Order Arrived
Customer
(days ago)
Processing
Time (days)
Due Date
(days from
now)
A
3
B
2
C
10
D
E
8
6
22228
24
32
58
100
20
26
12
50
66
a. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average days past due.
Using the FCFS (first come, first served) decision rule for sequencing the customers, the order is:
Sequence
1
2
3
4
5
Customer C
D
E
A
B
Using the EDD (earliest due date) decision rule for sequencing the customers, the order is (to resolve a tie, use the order in which the jobs were received):
Sequence
1
2
3
4
5
Customer
C
D
A
E
B
The average flow time and average days past due for each option are: (Enter your responses rounded to one decimal place.)
Rule
EDD
FCFS
Average Flow Time
Average Days Past Due
Transcribed Image Text:Currently a company that designs Web sites has five customers in its backlog. The time since the order arrived, processing time, and promised due dates are given in the following table. The customers are ready to be scheduled today, which is the start of day 190. Question Viewer Time Since Order Arrived Customer (days ago) Processing Time (days) Due Date (days from now) A 3 B 2 C 10 D E 8 6 22228 24 32 58 100 20 26 12 50 66 a. Develop separate schedules by using the FCFS and EDD rules. Compare the schedules on the basis of average flow time and average days past due. Using the FCFS (first come, first served) decision rule for sequencing the customers, the order is: Sequence 1 2 3 4 5 Customer C D E A B Using the EDD (earliest due date) decision rule for sequencing the customers, the order is (to resolve a tie, use the order in which the jobs were received): Sequence 1 2 3 4 5 Customer C D A E B The average flow time and average days past due for each option are: (Enter your responses rounded to one decimal place.) Rule EDD FCFS Average Flow Time Average Days Past Due
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