Rational designing of foundry enterprises is based on a program allowing for both the quantitative and qualitative aspects of production. Studies carried out in this respect are mainly oriented at the task of establishing a classification system of castings and formalising their description. This article refers to the absolute classification and technological classification of castings existing so far; some principles of the formation of a model of the data on production program have been presented as well. The program was written by the technique of relational databases with description of the documents and diagrams of relations existing between the data.
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