The jobs listed below need to be completed. Assume that it is now day 140. If...
The jobs listed below need to be completed. Assume that it is now day 140. If the jobs are sequenced according to the longest processing time rule, what is the lateness of job A?
|
Job |
Processing Time (days) |
Job due date (days) |
|
A |
20 |
180 |
|
B |
30 |
200 |
|
C |
10 |
175 |
|
D |
16 |
230 |
|
E |
18 |
210 |
All dates are specified as manufacturing planning calendar days. Assume that all jobs arrive on day 140. Assume each job starts at the beginning of the day and finishes at the end of the day (a job that begins on day 140 and takes 8 days will finish on day 147, and the next job begins in the morning of day 148). Compute all times based on initiating work on day 140.
A.
0.0 days
B.
7.4 days
C.
24.0 days
D.
9.0 days
E.
11.6 days
Homework Answers
As per the longest processing time, we will process B first. It will start on the day 140 and end on day 169 (30 days).
A then starts on Day 170 and takes 20 days and ends on Day 189.
JoB A Latesness = 189 - 180 = 9 days
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(assume that jobs came in the order in which they are listed in
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1
A
2
B
3
C
4
D
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E
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using the FCFS rule = ___ days (round your response to two
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