1)In final inspection did not noticed,because the operator missed to inspect the part in CMM.
2)Part was wrongly loaded by the operator.
3)Earlier process required picking of the reference for every part that was loaded on the machine,and the operator could have missed picking the correct refrence.
4)This subject part was to be inspected on the CMM at the start the 2nd shift,communication gap between the shift operator could be the probable reason for not being noticed during CMM inspection.