Problem:
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 |
| |
Required:
Question 1) If the due date rule is used, what sequence should be used?
Question 2) What will be the average job tardiness? (Round your answer to 2 decimal places.)
Question 3) What will be the average number of jobs in the system? (Round your answer to 2 decimal places.)
Question 4) Would the Shortest processing time rule produce better results in terms of average job tardiness?
Solve the given numerical problem and illustrate step by step calculation.