A method for determining a minimal translation vector (MTV) between a first object and a second object represented in a CAD system, and a CAD system and computer readable medium for performing a similar method. The method includes retrieving the first object and the second object and tessellating the first object and second object into respective facets. The method includes creating a bounding volume tree of facets corresponding to each of the first object and the second object. The method includes performing a greedy process on the bounding volume to produce an initial MTV, and performing a successive clipping process according to the bounding volume trees and the initial MTV, to produce a final MTV. The method includes storing the final MTV in a computer readable medium. The greedy process can be a 2-step process as described.