Evaluation of intelligent decision support system iWizard-E prediction possibilities

The intelligent decision support systems process a large amount of data. Often, the information is duplicated, which slows down the process of predictive models building. The iWizard-E system, which is designed to assist the university applicants in choosing a training direction, has the function of duplicate records removal from the data before building a predictive model. The paper analyzes the influence of the mentioned function on the system operation. To this end, a series of experiments were conducted, during which various samples were processed, containing the individual features of students and the information about their graduation from the university, after which the recommendations were generated regarding the choice of a preferred course of study. The samples were formed on the basis of a set containing only unique records. Then the real data were compared with the results issued by the system. The F-measure was used as a quality criterion. It was found that duplicate removal has a positive effect on the quality of work of iWizard-E. This fact is of high practical significance: the amount of data required for the formation of reliable predictive models and, as a result, reliable recommendations to the applicants is reduced. Moreover, the time required to build the predictive models is reduced.