Seeking Insights on Relative Displacement Accuracy

I am conducting experiments with a UR5e and aim to catalog all uncertainty factors, particularly the relative displacement error. While I’ve noted the position repeatability of +/-0.03mm, I question whether this encompasses the relative displacement error. Specifically, when requesting a 1mm displacement, what would be the maximum expected deviation? In other words, I am seeking the value that defines the actual range of displacement as 1mm +/- ? mm.