It has been so far said that the flow line system might be applied mainly to the mass production industry, while the application of this system is difficult to the unique product production industry in view of the diversity of products. Accordingly, the flow line system has been adopted in the shipbuilding industry, in such limited cases as in the prefabrication stage of hull assemblies which compose parallel part of tanker and has failed to contribute to the improvement of general production system of shipbuilding industry. Through the study on the intrinsic nature of flow line system, however, the authors have developed a new system of control technique so that a group of techniques fostered in the mass production can be applied to shipbuilding industry which is typical in diversified products production. This new control system has been applied to shipbuilding industry, characteristically utilizing the flow line system. Accordingly, this system can be applied in a similar manner to the other territory of diversified products production, e. g., machine industry. The promotion of this new production system in shipbuilding industry has thus marked an epoch-making development through the introduction of electronic computers into the planning and control system of production and thereby maximum efficiency is realized in shipyard management including not only hull works but also outfitting works.