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NOVEMBER 2022 I DESIGN007 MAGAZINE 41 When the Going Gets Rough In the first part of this column, I looked at how an understanding of statistics helps maximise yields when working with composite materi- als. But copper is not a composite; it is a "pure" ity is one of the key areas where a design or SI engineer can add value to the production pro- cess and ensure a product is either profitable— if commercial—or within budget for contrac- tual purposes. Figure 3: Monte Carlo tolerance of 10% on all parameters but 20% on Er. Figure 2: Monte Carlo tolerance of 10% on all parameters but 5% on trace separation.