[solution] » 6.  (18 points) Today is the start of Day 4 and John Smith is ready to start schedu

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6.  (18 points)

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) (time to due date/processing time).  Use the definitions of these scheduling rules as we defined them on the homework assignments.

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?

 

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Oct 14, 2020

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