Measurement Matters – Think Guardband
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Optimize false pass and false fail with guardbanding
Based on your product specifications, yield and quality goals vary. Based on these goals, you can optimize the trade-offs between false pass (passing a defective product) and false fail (failing a good product) with guardbanding.
Measurement uncertainty (MU) is a key contributor to false pass and false fail conditions. When the MU is known, setting guardbanding test limits will reduce false passes.