In: Operations Management
1) Eagle Fabrication has the following aggregate demand requirements and other data for the upcoming four quarters.
Quarter |
Demand |
Previous quarter's output |
1500 units |
1 |
1400 |
Beginning inventory |
200 units |
2 |
1000 |
Stockout cost |
$50 per unit |
3 |
1500 |
Inventory holding cost |
$8 per unit at end of quarter |
4 |
1300 |
Hiring workers |
$5 per unit |
Laying off workers |
$10 per unit |
||
Unit cost |
$30 per unit |
||
Overtime |
$10 extra per unit |
Which of the following production plans is better: Plan A—chase demand by hiring and layoffs; or
Plan B—produce at a constant rate of 1200 and obtain the remainder from overtime?
Finish the calculation and show all work!
Plan A:
Eagle Fabrication Solution
Demand |
Regular Time Capacity |
Regular Time Production |
Hire |
Fire |
|
Initial Inventory |
|||||
Period 1 |
1,400 |
1200 |
|||
Period 2 |
1,000 |
||||
Period 3 |
1,500 |
||||
Period 4 |
1,300 |
||||
Total (units) |
5,200 |
||||
@$30/unit |
@$5/unit |
@$10/unit |
|||
Subtotal Costs |
$?????? |
$???? |
$???? |
||
Total Cost |
$?????? |
Plan B:
Eagle Fabrication Solution
Demand |
Regular Time Capacity |
Overtime Capacity |
Regular Time Production |
Overtime Production |
Inventory (end PD) |
Fire |
|
Initial Inventory |
200. |
||||||
Period 1 |
1,400 |
1,200 |
|||||
Period 2 |
1,000 |
||||||
Period 3 |
1,500 |
||||||
Period 4 |
1,300 |
||||||
Total (units) |
5,200 |
||||||
@$30/unit |
@$30+@$10 = @$40/unit |
@$8/unit |
@$10/unit |
||||
Subtotal Costs |
$?????? |
$???? |
$???? |
$???? |
|||
Total Cost |
$?????? |
Answer:
Plan A | |||||||
Demand | Inventory | Stockout | Regular Time Capacity | Regular time Production | Hire | Fire | |
Period 1 | 1400 | 200 | 0 | 1200 | 1200 | 0 | 0 |
Period 2 | 1000 | 0 | 0 | 1000 | 1000 | 200 | |
Period 3 | 1500 | 0 | 0 | 1500 | 1500 | 500 | 0 |
Period 4 | 1300 | 0 | 0 | 1300 | 1300 | 0 | 200 |
Total | 5200 | 200 | 0 | 5000 | 5000 | 500 | 400 |
Unit Cost | $ 30.00 | $ 5.00 | $ 10.00 | ||||
Subtotal Cost | $1,50,000.00 | $ 2,500.00 | $ 4,000.00 | ||||
Total Cost | $1,56,500.00 |
Regular time Capacity = Demand - Inventory
Hire/ Fire = Absolute difference between Regular Time Capacity of current period and immediate last period.
Plan B | |||||||
Demand | Beginning Inventory | Regular Time Capacity | Overtime Capacity | Regular time Production | Overtime Production | End Inventory | |
Period 1 | 1400 | 200 | 1200 | 200 | 1200 | 0 | 0 |
Period 2 | 1000 | 0 | 1200 | 0 | 1200 | 0 | 200 |
Period 3 | 1500 | 200 | 1200 | 100 | 1200 | 100 | 0 |
Period 4 | 1300 | 0 | 1200 | 100 | 1200 | 100 | 0 |
Total | 5200 | 400 | 4800 | 4800 | 200 | 200 | |
Unit Cost | $ 30.00 | $ 40.00 | $ 8.00 | ||||
Subtotal Cost | $1,44,000.00 | $ 8,000.00 | $ 1,600.00 | ||||
Total Cost | $1,53,600.00 |
Regular time capacity is constant in this Plan at 1200.
Overtime Capacity = Demand - Beginning Inventory - Regular time Capacity
Regular time production = Regular time capacity
Overtime production = Overtime capacity
End Inventory (only if Regular time production > Demand) = Regular time production - Demand
Comparing total cost of both plan, we can say that Plan B is better than Plan A.