For the purpose o f expansion of the data analysis activities, a system named IDEA (Information DEsign Aid) has been developed to apply for quality control at Mizushima Works of Kawasaki Steel Corporation (KSC). The system consists of the three sub-systems: analysis support, database structure, and operation support.The system is intended to be highly efficient and useful by providing a large amount of data storage in its items and volumes collected in the production lines, a sophisticated software easily accessible for a number of personnel at the terminals, and activities for supporting the computer utilization in routine and provisional jobs of the terminal users. The system has been found useful in reducing the workload for data collection and analysis and improving the analysis accuracy; this contributes to the efficiency not only in analysis work but also in various staff work.
A Basic Oxygen Furnace(BOF), which refines steel, is a typical batch type process, and it has been computer-cotrolled with mathematical models. Since the conditions of materials for the process often vary from time to time, it is important to periodically update the models to keep up with the change of the process.In the Mizushima works, a model analysis system for BOF refining cotrol has been developed in order to easily maintain the accuracy of the models. The system consists of four parts; data extraction, simulation, accuracy evaluation and statistical analysis, thereby statistical models such as multi-regression equations can be automatically analyzed, using accumulated actual data.The system has contributed to the improvement of the model accuracy and consequently to the saving of sub-materials and better hit rate of refining.
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