Rough Sets Applied to the RoughCast System for Steel Castings

Rough logic and rough sets theory are mainly devoted to analysis of incomplete, uncertain, and inconsistent data. An exploited in the article result of the theory is the so-called rough information system that gives a model for dealing with the situation in which some real objects are represented ambiguously via defined approximation (alternatives of values of the objects attributes). The proposed rough system opens a way to process such information and moreover is equipped with a powerful query language and possibility to classify real objects based on their stored rough characteristics. The implemented RoughCast system and, especially prepared for the case, knowledge base for steel casting defects form such the rough information system. They can be successfully applied in the process of knowledge integration concerning production of steel castings and, in consequence, as a tool in solving technological problems in operating foundries.