RSS tolerance analysis

root sum of squares stack-up

T = √(Σ tᵢ²)

A statistical tolerance stack-up that adds independent tolerances in quadrature, assuming each is ±3σ of a centred normal distribution. It gives a narrower, more realistic range than the worst case sum.

Calculate it

Tolerance Stack-Up: Worst case, RSS and Monte Carlo for a dimension chain, with contributions.

Related terms

• Specification limits (LSL, USL): voice of the customer