Question: The table below shows processing times and due dates for five jobs. JOB PROCESSING TIME (DAYS) DATE DUE FROM TODAY A 8 12 B 4

The table below shows processing times and due dates for five jobs.

JOB

PROCESSING

TIME (DAYS)

DATE DUE

FROM TODAY

A

8

12

B

4

9

C

3

6

D

10

11

E

6

20

(i) What is the average flow-time, if the Shortest Processing Time Rule (SPT) is used to sequence these jobs?

(ii) What is the average lateness, and (iii) tardiness, if the Earliest Due Date Rule (EDD) is used to sequence these jobs?

Select one:

(i) Average Flow Time: 11.6 days (ii) Average Lateness: 3.4 days (iii) Average Tardiness: 5.8 days

(i) Average Flow Time: 6.2 days (ii) Average Lateness: 4 days (iii) Average Tardiness: 5.2 days

(i) Average Flow Time: 15 days (ii) Average Lateness: 5 days (iii) Average Tardiness: 6 days

(i) Average Flow Time: 15 days (ii) Average Lateness: 6 days (iii) Average Tardiness: 5 days

(i) Average Flow Time: 6.2 days (ii) Average Lateness: 7 days (iii) Average Tardiness: 5.8 days

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