Capacity Planning in the Face of Product-Mix Uncertainty

Then calculate how far this is from 85 lets say that

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: t is a mix-driven capacity constraint, find its capacity loading under the forecast scenario. Then calculate how far this is from 85%. Let’s say that Tool Group X turns out under the forecast scenario to have a capacity loading of 80.0%. Therefore this tool group’s capacity loading could be increased five percentage points before it would reach 85%, necessitating purchase of an additional tool. Calculate the number of wafers that would have to be shifted from the lightest- to the heaviest-loading product to bring this tool group to 85% loading. In this example, it’s (85-80)/.130 = 38 wafers. In the forecast product mix, shift the 38 wafers from the lightest- to the heaviest-loading product and recalculate the product-mix percentages (note: if you “run out of” the most lightly loading product, run the calculations for the next-most lightly loading product and remove any “overkill” wafers from that product). In our case, let’s say that the forecast called for 300 WGR divided among Products A/B/C 60/10/30%, or 180/30...
View Full Document

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.

Ask a homework question - tutors are online