I'm aware that PC-DMIS outputs equally disposed bilateral profile results by taking the largest deviation (whether max or min) and doubling it. I sort of figured this as a way of saying what the profile would "have to be" in order to pass by "moving" the theoretical boundary planes on both sides of nominal/zero. My question is, why with an unequally disposed unilateral profile does it still double the largest deviation since all of the tolerance is only allowed on either the "more" or "less" material direction of the surface?
Example:
Looking at the results it seems like the min/max is coming from the added .005" max material boundary with the largest deviation being .0021" below that boundary while not violating the tolerance direction (going below the nominal surface). So my question is, why is it still doubled instead of a profile result of .0021"?
