Reverse Engineering is the process of creating a CAD model from mesh data. Typically geometrical parts are reconstructed using conventional parametric modelling tools to capture the original design intent. When scanning an object, all surface geometry is captured, including imperfections caused by the manufacturing process and any damage the part may have suffered. Typically, unless expressly asked not to do so, the part will be remodelled capturing the design intent and disregarding imperfections. There are some good reasons for this. First, modelling in every single defect would be time consuming and therefore expensive. Secondly, one of the main reasons for reverse engineering is to remake the part. Therefore the requirement is to create a ‘perfect’ part representing true design intent. Sometimes the true design intent is difficult to determine due to defects in the part. Often ambiguities are obvious before starting the reverse engineering process however some only become evident after work commences. Information provided by the client prior to starting the process can help to reduce these uncertainties.