Q#19

The table below shows processing times and due dates for five jobs.

JOB	PROCESSING TIME (DAYS)	DATE DUE FROM TODAY
A	16	24
B	23	30
C	22	40
D	8	26
E	15	21

(i) What is the average flow-time, if the Earliest Due Date Rule (EDD) is used to sequence these jobs?

(ii) What is the average lateness, and (iii) tardiness, if the Shortest Processing Time Rule (SPT) is used to sequence these jobs?

Select one:

(i) Average Flow Time: 16.8 days (ii) Average Lateness: 22 days (iii) Average Tardiness: 17.2 days

(i) Average Flow Time: 46.2 days (ii) Average Lateness: 18.4 days (iii) Average Tardiness: 14.8 days

(i) Average Flow Time: 16.8 days (ii) Average Lateness: 25.6 days (iii) Average Tardiness: 27.2 days

(i) Average Flow Time: 43 days (ii) Average Lateness: 18 days (iii) Average Tardiness: 19.2 days

(i) Average Flow Time: 46.2 days (ii) Average Lateness: 14.8 days (iii)Average Tardiness: 18.4 days

Question 18

Item: Midgets Safety Stock Required: 80 units Lot Size Rule: Periodic OQ (POQ) = 3 weeks Current On-Hand Quantity = 260 units Lead Time: 2 weeks Scheduled receipts: none
Week		1	2	3	4	5	6	7	8	9
Gross Requirements		180		40	80		120		120
Scheduled Receipts
Projected On Hand	260
Planned Receipts
Planned Order Releases

Complete the MRP record based on the information at the top of the table (some which is already filled in), and answer the following questions:

(i) What is the Planned Order Release for the Week 2 ?

(ii) What is the Projected On Hand for the Week 7 ?

Select one:

(i) Planned Order Release for the Week 2: 80 (ii) Projected On Hand for the Week 7: 0

(i) Planned Order Release for the Week 2: 80 (ii) Projected On Hand for the Week 7: 80

(i) Planned Order Release for the Week 2: 120 (ii) Projected On Hand for the Week 7: 120

(i) Planned Order Release for the Week 2: 120 (ii) Projected On Hand for the Week 7: 80

(i) Planned Order Release for the Week 2: 0 (ii) Projected On Hand for the Week 7: 200