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Unformatted text preview: In Figure A, for Tool Group X, these products are Product C and Product A, respectively. For that tool group, calculate capacity loading per wafer for each of the two products. Do this by first looking at the product that most lightly loads the tool group. See what its capacity loading was on the tool in its dedicated run (i.e., the run consisting 100% of this product). Divide this capacity loading by the WGR of that run to get capacity loading per wafer. Do the same for the heaviest loading product. For example, for Tool Group X, for Product C, this is 103.2% / 300 WGR = .344 capacity-loading percentage points per wafer; for Product A this is 64.2% / 300 WGR = .214 capacity2 Figure A: Tool Production Allocation By Product Any tool group that is loaded greater or less than average (Allocation Percent of 33.3% in the above example) by any product is mix sensitive. In Figure A, all three tool groups shown are mix sensitive. For example, for Tool Group Y, 100 wafers per week of Product A requires less...
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This note was uploaded on 04/11/2011 for the course ECE 357 taught by Professor Subjolly during the Spring '11 term at National University of Ireland, Galway.
- Spring '11