I tried using TolAnalyst to calculate RSS stackup on Gear Box Assembly given at Help Tutorials.

Do you know how **Min** and **Max** values are calculated both **WC** and **RSS** **at backgraund**?

RSS min max values are calculated iaw **1 sigma** or **3 sigma**?

U.B,

I don't use TolAnalyst, but I would assume that it just does the square root of the sum of the squares for the values you put in for the tolerances. Whether those numbers mean 1 sigma or 3 sigma is up to the person who supplies them. Personally, I use 3 sigma values when I've got actual data.

Jerry S.