This paper deals with automatic three-dimensional (3D) functional tolerancing. A combination between the Minimum Transfer Modified Method (MT-2M) and qualitative tolerancing method for prismatic parts is developed. The MT-2M is used for the recognition of functional surfaces. This technique lies in integrating the projections of surfaces of the parts under consideration along the three axes (X, Y and Z) and the contacts between these same surfaces in one table of matrix representation of the assembly....