# Statistical tolerance stack
# Scope: Independent zero-mean standard uncertainties, linear unit sensitivity.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

sigmaA = 0.1 mm
sigmaB = 0.2 mm
sigmaC = 0.05 mm

combined := sqrt(sigmaA^2+sigmaB^2+sigmaC^2) [mm]

check standard uncertainty budget: combined <= 0.3 mm

scenario alternative: sigmaA = 0.08 mm