Abstract: An automated system of managing a group of frame numbers to identify each vehicle in different vehicle model groups is provided. This system comprises a first computer which creates frame number groups and a production ratios of various model vehicles to be produced according to an assigned production schedule; a second computer which takes these frame numbers and organizes them according to the production ratio and serialized numbers to be stamped; and a stamping machine to display and stamp the serialized frame numbers automatically on frame components. Accordingly, the operator is able to check the frame numbers easily with minimum human errors so as to preserve data integrity and stamping errors. This system is also applicable to mixed production of large number of models using a common assembly line.