A method provides for measuring an assembled component including two or more parts, the method including the steps of: providing the component with a plurality of unique markers for detection during a scanning process; defining a first of the unique markers and aligning the first defined unique marker with a first element of the component; defining a second of the unique markers and aligning the second defined unique marker with a second element of the component; scanning the component and unique markers to capture a digitised version of the component and the relative positions of the first and second defined unique markers; and aligning a nominal CAD model of a part of the component with the equivalent part of the digitised version of the component using the relative positions of the first and second defined unique markers.