when Budd’s shop opened today, five orders

Problem 16-18

The Budd Gear Co. specializes in heat-treating gears for automobile companies. At 8:00 a.m., when Budd’s shop opened today, five orders (listed in order of arrival) were waiting to be processed.


Order Order Size
Per Unit Time in
Heat Treatment
Due Date
(min. from now)
A 16 4 160
B 6 12 200
C 10 3 180
D 8 10 190
E 4 1 220


a. If the due date rule is used, what sequence should be used?


  The sequence is .


b. What will be the average job tardiness? (Round your answer to 2 decimal places.)


  Average job tardiness  new average job tardiness is [removed] minutes.
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