12. Big Dan’s Machine Shop is considering the use of a priority scheduling rule in the fabrication shop and must decide whether to use: (1) critical ratio, (2) earliest due date, (3) shortest operation next, or (4) order slack. The current shop status of the company is given here:

a. Using the four sequencing rules, compute the scheduling priority for each order given in the table above.

b. What order should be run first under each of these scheduling rules?

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Total Remaining Time Order Number Manufacturing Remaining until 2 12345 Due Date 12 15 Current Operation Processing Time 8 5 Time 15 12 10 14 4 15 18 3 20 19 6