Today is the start of Day 4 and John Smith is ready to start scheduling the following jobs. Jobs are assigned a letter of the alphabet, starting with the letter A, based on their arrival.
|
Job
|
Processing Time (in days)
|
Due Date (End of Day)
|
|
A
|
3
|
10
|
|
B
|
10
|
12
|
|
C
|
2
|
25
|
|
D
|
4
|
8
|
|
E
|
5
|
15
|
|
F
|
8
|
18
|
|
G
|
7
|
20
|
a) Sequence these jobs based on the following scheduling rules: Slack and critical ratio (CR)
b) Based on average flow time measured from today (start of Day 4), which of the sequencing rules is preferred?
c) Based on the average lateness with no credit given for jobs completed early, which of the sequencing rules is preferred?
d) Based on the average early time with zero days early if the job is completed late, which of the sequencing rules is preferred?