We don’t get rid of stackup with GD&T. GD&T is a functional dimensioning and tolerancing. And stackup is the way to optimize dimensions and tolerancing to still achieve the function with all dimensional variations. Without stackup you will never come to know how part variations impact the assembly function. So, they both complete each other.
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i thought we get rid of tolerance stackup by using GD&T, why we should perform stackup analysis still
We don’t get rid of stackup with GD&T. GD&T is a functional dimensioning and tolerancing. And stackup is the way to optimize dimensions and tolerancing to still achieve the function with all dimensional variations.
Without stackup you will never come to know how part variations impact the assembly function.
So, they both complete each other.