Based on computer-aided design techniques, Calypso version 4.4 measurement software has been released by Carl Zeiss Industrial Metrology. The Vast navigator function optimizes scanning measurements by selecting the optimum speed with regard to tolerance and stylus geometry. The “bucking mechanism” function enables precise inspection of small feature transitions such as geometries on valve seats. During measurement, the stylus moves from the edge points to empty space, and the values specified in the CAD model cannot be reliably inspected for their actual values. The relative measurement function enables reliable measurement of the desired position by referencing locations that can be probed. The programming has been optimized to facilitate off-line generation of measurement programs.