What is position tolerance in GD&T and when is it used?

Position tolerance controls the location of a feature (typically a hole or boss) relative to datum references. It defines a cylindrical or width tolerance zone within which the feature's axis or center plane must lie. Position is the most commonly used GD&T symbol, especially for hole patterns, as it controls both location and orientation simultaneously. It is applied at MMC, LMC, or RFS depending on functional requirements.