This research work describes a novel approach for comparing different technologies for
free form surface metrology: computerized tomography (CT), photogrammetry and coordinate
measuring machines (CMM). The comparison has the aim of providing relevant information for
the selection of metrology equipment when measuring free form components. Results
demonstrate that there is the imperative need to assess the uncertainty and
reproducibility of CT and photogrammetry measurements by applying some calibration
procedures taking into account some recommendations for work piece alignment. This article
also deals with costs issues, required standards, and necessary additional information
when selecting inspection equipment.