A foreman has determined processing times at a work center for a set of jobs and now wants to sequence them. Given the information shown, do the following:

Job	Job Time (Days)	Due Date	Operations Remaining
a	4.5	10	3
b	6.0	17	4
c	5.2	12	3
d	1.6	27	5
e	2.8	18	3
f	3.3	19	1

a-1. Determine the processing sequence using (1) First come, first served, (2) Shortest processing time, (3) Earliest due date, and (4) Critical ratio.

Sequence for first come first serve: _____

Sequence for shortest processing time: _____

Sequence for earliest due date: _____

Sequence for critical ratio: _____

a-2. For each sequence, compute the average job tardiness, the average flow time, and the average number of jobs at the work center. The list is in First come, first served order. (Round your intermediate calculations and final answers to 2 decimal places.)

	first come first serve:	shortest processing time	earliest due date:	critical ratio:
avg job tardiness
avg flow time
avg number of jobs

b. Using the results of your calculations in part a, show that the average flow time and the average number of jobs measures are equivalent for all four sequencing rules. (Hint: Calculate the ratio of average flow time and the average number of jobs for each rule.) (Round your answer to 2 decimal places.) The ratio is aproximately ______

c. Determine the processing sequence that would result using the Slack per operation rule. The sequence is _____