Yield vs Cost Calculator
The focus of USEA is maximizing process yields. USEA test yields are maximized by strict process controls, strong engineering resources and data analysis tools.
The following program will allow you to determine how process yield contribute to profits.
 PriceCost
 USEAVendor XUSEAVendor X
Wafer 
Wafer Cost ($)
Units/Wafer  
Die Cost ($)  
Sort Cost Per Die($)
Yield (%)  
Cost Sub-total e-sort ($)
Good Units
 
 
Assembly 
Start Qty  
Assembly Cost Per Unit  
Assembly Yield (%)  
Good Units  
Total Assembly Cost
Cost Sub Total
 
 
Final Test 1 
Start Qty
Final Test 1 Cost  
Final Test 1 yield (%)  
Qty Good  
Production Cost per Unit
Cost Sub Total  
 
 
Final Test 2 
Start Qty
Final Test 2 Cost  
Final Test 2 yield (%)  
Qty Good  
Production Cost per Unit
Cost Sub Total  
 
 
Final Test 3 
Start Qty
Final Test 3 Cost  
Final Test 3 yield (%)  
Qty Good  
Production Cost per Unit
Cost Sub Total  
 
 
Tape & Reel 
Start Qty
Cost  
Tape and Reel Yield  
Qty Out  
Cost Sub Total  
 
 
Total Good Units  
ASP  
 
Total Revenue  
Production Cost  
Shipping Cost  
Support Cost  
Total Production Cost  
Total Cost per Unit  
 
Operational Profit  
 
Profit Per Unit  
Ours is better.....
1 . Many Companies focus on the cost per hour for test.
2 . Focus on test cost per hour may result in a slightly lower unit cost test, process yield is sacrificed.
3 . Test cost per hour has no incentive to maximize test yields.
4 . Test contacts degradation is common cause of yield loss.
5 . The corrective action results in significant down time and increased contactor cost.