Information Model for Machine’s Electronic Structure Storage

Abstract

The article formulates the reasons for the use of a formalized electronic structure of a product at a machine-building enterprise. The article reported similarities and differences of design, technological, and production structure of the engineering product. It described in short the basic requirements for the composition of the product according to GOST ESKD and according to the practical experience. Based on the formulated requirements, a model for storing of a machine-building product’s composition in the form of a directed acyclic graph is proposed. In this case, the nodes of this graph are the elements of the engineering product, and the edges are the facts of the entry of one element of the product into another. The article presents the permissible types of elements that make up a model of a machine-building product: an assembly unit, a assembly part, a material, a purchased item, and a billet. For each type, it is introduced a set of attributes required to fully describe an element of this type. It is given the matrix of available entrance occurrences of various elements types into each other. It is shown how one can imagine the variable composition of the engineering product with the help of the proposed model. The purposed model can be used at machine-building enterprises in PDM and ERP systems of its own design. The main features of the presented model are simplicity, full compliance with ESKD/ESTD requirements.