For more than 10 years, the MHI Shipbuilding Division has been using its own design systems, MARINE and MATES, to improve design efficiency. Recently, a new production support system has been developed and put to practical use in the Production Department. The system uses the design data supplied by MATES, and has achieved efficient production management. Furthermore, new automated facilities have been introduced by the Nagasaki Shipyard, for which the design data from MATES is in a prerequisite. This has led and lead to a remarkable improvement in productivity. The successful introduction of this production support system and the automated facilities was because information is integrated from design all the way to production, and in this sense, MHI's CIM has now been constructed. This paper gives on outline of MHI's CIM, focusing on the systematization of the Production Department.