Model and algorithm for supporting decision on selection of products for recommendation to user based on analysis of statistical implication

The article considers the issues of analyzing data that the consumer encounters when choosing products and services. The problem is extracting useful information that allows offering the user new products and services depending on his preferences. This problem is localized by recommender systems focused on using the data mining methods, such as classification, clustering, analysis of association rules - a machine learning method that detects relationships between variables in databases. Compared to other methods, the advantage of the association rule-based recommender method is its transparency: the method can show the user the inference mechanism used to make decisions. Association rule-based recommender systems use two measures that are widely popular and evaluate sets of elements and create sets of association rules, the support measure and the confidence measure. However, to get better recommendations, the quality of association rules and the way sentence ranking should be measured by some objective measure. There has been developed a model and a decision support algorithm for the choice of products for recommendations to the user based on the statistical implication analysis method. In the proposed solutions, support and credibility measures are used to create association rules; a measure of the intensity of the statistical implication is used to filter the set of rules and to rank the recommendations.