Month |
Demand |
Month |
Demand |
July |
400 |
Oct |
700 |
Aug |
500 |
Nov |
800 |
Sep |
550 |
Dec |
700 |
Item |
Cost |
Materials |
$35/disk |
Inventory |
$8/disk/month |
Subcontracting |
$80/disk |
Stock-out |
$15/disk |
Regular time labor |
$12/hour |
Overtime labor |
$18/hour (above 8 hrs) |
Hiring cost |
$40/worker |
Layoff cost |
$80/worker |
Other data include:
Item |
Data |
Current workforce (June) |
8 people |
Labor hours per disk |
4 hrs |
Workday per month |
20 days |
Beginning inventory |
150 disk |
Ending inventory requirement |
0 |
Month |
Hired |
Laid off |
Workforce |
Inventory |
Production |
July |
|||||
Aug |
|||||
Sep |
|||||
Oct |
|||||
Nov |
|||||
Dec |
b) How much is the total regular time cost?
c) The manufacturer decides to revise its plan and maintain its current workforce to produce the requirement. Overtime limit is still 20 hours per worker per month while ending inventory should be equal to the beginning inventory. Prepare the aggregate plan under the condition.
Month |
Overtime |
Inventory |
Stockout |
Subcontract |
Production |
July |
|||||
Aug |
|||||
Sep |
|||||
Oct |
|||||
Nov |
|||||
Dec |
d) Is the revised schedule better than the original plan? Why?
A disk drive manufacturer is in need of an aggregate plan for July to December. The...
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