Dumfries Industries is generating a materials requirement plan for the next six weeks. Here is its...

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General Management

Dumfries Industries is generating a materials requirement planfor the next six weeks. Here is its most current information:
Master Production Schedule
Week
1
2
3
4
5
6
Item A
10
0
20
20
10
10
Other information
Item
Item’s Parent
Lead time
Lot size
Current inventory
A
None
1 week
LFL
20
B
A
1 week
20
20
C
B
1 week
50
20
How many levels does a product structure for Dumfries item Ahave?
Using MRP methodology, how much of Parts A, B, and C should beordered, and when should they be ordered?
Which item will experience the highest average inventory,following this plan?
Consider the following three jobs: Job Alpha requires two weeksof work and is due in four weeks. Job Beta requires three weeks ofwork and is due in five weeks. Job Carlos requires one week of workand is due in three weeks. If these jobs are completed inalphabetical order, how late will Job Beta be?
Suppose you have three jobs waiting to be completed, and youmust determine the sequence in which these jobs should be workedon. You calculated the critical ratio for each of the jobs and theresults were that Job A has a critical ratio of 1.27, Job B has acritical ratio of -0.89, and Job C has a critical ratio of 0.15.Which of these jobs is already late? Why?

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1 MRP Problemof Dumfries IndustriesMPS for EndItemAWeek number0123456Quantity010020201010Item AOH 20LT1SS0QLFLGross reqmts010020201010Scheduled receipts0000000Projected on hand20201010000Net reqmts00010201010Plannedorder receipts00010201010Plannedorder releases00102010100Item BOH See Answer

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Item	Item’s Parent	Lead time	Lot size	Current inventory
A	None	1 week	LFL	20
B	A	1 week	20	20
C	B	1 week	50	20

Week	1	2	3	4	5	6
Item A	10	0	20	20	10	10