Question

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 (units)	Per Unit Time in Heat Treatment (minutes/unit)	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           

c. What will be the average number of jobs in the system? (Round your answer to 2 decimal places.)

Average number of jobs           

d. Would the Shortest processing time rule produce better results in terms of average job tardiness? (Round your answer to the nearest whole number.)

(Select Yes or No )new average job tardiness is ___ minutes.

Answer 1

Formulae used:

(a). As per Due Date sequencing, the sequence should be: A --> C --> D --> B --> E

(b). Average tardiness = 15.2 min

(c). Average no. of jobs in the system = 3.31

(d). Yes. New average tardiness = 12 min.