Question 2

Using the information presented in the following table, answer the following questions. (Hint: First determine the total job time for each job by calculating the total processing time for the job and then adding in the setup time. All times are in hours.)

Job	Processing Time (hr) per Unit	Units per Job	Setup Time (hr)	Due Hour
a	0.14	45	0.7	4
b	0.25	14	0.5	10
c	0.10	18	0.2	12
d	0.25	40	1.0	20
e	0.10	75	0.5	15

a. Identify the processing sequence that would result using priority rules.

Rule	Sequence
MST	(Click to select) d-e-b-a-c c-d-e-b-a a-b-e-d-c b-d-e-c-a
SPT	(Click to select) c-b-a-e-d c-d-e-b-a d-e-b-a-c b-d-e-c-a
EDD	(Click to select) a-b-c-e-d c-d-e-b-a d-e-b-a-c b-d-e-c-a
CR	(Click to select) a-d-e-b-c c-d-e-b-a d-e-b-a-c b-d-e-c-a

b. For each priority rule, determine (1) average flow time, (2) average hours late, and (3) average WIP. (Round the final answers to 2 decimal places.)

	MST	SPT	EDD	CR
Average flow time
Average hours late
Average WIP

c. Is one priority rule superior to the others?

• Yes

• No