Tolerance Stack-Up Analysis

Overall design risk based on predicted yield, worst-case bounds, and the dimension contributing the most variance.

Every dimension at its extreme limit simultaneously — most conservative. Guarantees 100% in-spec but over-predicts the true range.

Tolerances combined as √(Σ tol²), assuming independent, normally distributed dimensions. Covers ~99.73% of assemblies (±3σ).

Randomly samples each dimension — most realistic prediction. P5/P50/P95 show where 5%, 50%, and 95% of assemblies fall. Set LSL/USL to see Ppk.