 Kuhn's GIUR method was recently reestablished as a robust method as evident through simulation and experiments yielding strong positive correlation coefficients of flake mass removed from retouched flakes.The GIUR method is best used on flakes that have been lightly retouched and it can only be used on flakes that are unifacial.Above all, whether the typological classification, function or technology, there is a premise in these analytic method.