An Efficient Interface Model of User Interaction with a Query-Type Information Service

The work solves the problem an analytical model constructing of the user interaction interface with an information system designed to provide information based on multi-parameter user requests. The model purpose is to evaluate the effectiveness of the interface and, accordingly, the interaction itself. To do this, using an example of typical work with an interface, the following prerequisites (as conditions) for modeling are introduced: the effectiveness of the interface, its forms and transitions between them, interface elements, the atomic efficiency of the element and form, the order of their arrangement and the empirical dependence of efficiency, as well as the formulation interface design tasks. Using these premises, an appropriate efficiency model has been formed, which allows us too analytically, based on the structure and parameters of the interface, evaluate its effectiveness, operativeness and resource efficiency. A software prototype was created, which was based on the model and with the help of which a number of experiments were carried out under three scenarios, consisting of changing the number of forms and interface elements in order to determine their impact on overall efficiency; the corresponding dependencies were obtained in the form of histograms. Conclusions are drawn regarding the accuracy of the model, its theoretical and practical significance, as well as the overall complexity of designing “ideal” interfaces.