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SOLUTION Homework (Sequencing) 22 02 2021

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Homework 22/02/2021
A copyshop offers a photocopying service to customers. Currently, it uses a FIFO system
because this seems the fairest way of working for the customers. However, the manager of
the shop suspects that an alternative sequencing rule may improve performance. Using the
data collected below, try the FIFO, DDS, SPT, LIFO and LPT sequences and state which rule
provides the best performance using the measure of average lateness.
FIFO
Job arrival
sequence
Processing
time (days)
Customer due
date (days)
Finish time
(days)
Lateness (days)
A
5
7
5
0
B
4
6
9
3
C
2
5
11
6
D
2
6
13
7
E
1
3
14
11
Average lateness: 5.4 days
Due date
Job arrival
sequence
Processing
time (days)
Customer due
date (days)
Finish time
(days)
Lateness (days)
E
1
3
1
0
C
2
5
3
0
B
4
6
7
1
D
2
6
9
3
A
5
7
14
7
Average lateness: 2.2 days

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Homework 22/02/2021 A copyshop offers a photocopying service to customers. Currently, it uses a FIFO system because this seems the fairest way of working for the customers. However, the manager of the shop suspects that an alternative sequencing rule may improve performance. Using the data collected below, try the FIFO, DDS, SPT, LIFO and LPT sequences and state which rule provides the best performance using the measure of average lateness. FIFO Job arrival Processing Customer due Finish time Lateness (days) sequence time (days) date (days) (days) A 5 7 5 0 B 4 6 9 3 C 2 ...
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