1. A system for assessing a fit of a femoral implant to a distal end of a femur in a selected orientation prior to resecting the femur, wherein the system comprises: means for obtaining pre-defined form factor information for plurality of femoral implants; means for obtaining surface shape information of the distal end of the femur; means for automatically performing a virtual fit assessment of each possible incremental position of a predefined set of incremental positions for each size implant to be considered prior to resecting the femur; and means for selecting an optimal implant size and position from the virtual fit assessments.