# Measurement uncertainty propagation
# Scope: First-order uncertainty in area; independent length uncertainties.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

length = 100 mm
width = 50 mm
sigmaLength = 0.1 mm
sigmaWidth = 0.2 mm

area := length*width [mm^2]
sigmaArea := sqrt((width*sigmaLength)^2+(length*sigmaWidth)^2) [mm^2]

check relative uncertainty budget: sigmaArea/area <= 0.01

scenario alternative: length = 80 mm