THE CALCULATE OF THE TIME COUNT SPENT ON A SELECTING OF SOFTWARE APPLICATION GUI ELEMENT

The article deals with the quality assessment of user interfaces (UI) of computer programs based on the proposed mathematical model. Most often, the quality indicator of a UI is understood as the total time of elementary operations (actions) of users on UI elements (UIE) spent on solving a specific task. UIE means such interface elements as input fields, icons, various types of lists, tables, etc. The elementary actions are understood as finding, achieving and managing UIE. Сalculating the time to perform user actions can be quite complicated. This is due to the fact that for the calculation it is necessary to know which screen form and which computer program the UIE belongs to, and also in the solution of which problem it participates and in what sequence. The article proposes a conceptual model of IDUs based on the ER diagram, which includes entities describing the UIs and the relationships between them. Analytical dependences are obtained for the calculation of one of the components of the quality index of computer programs, namely, the time the user spent finding interface elements placed on the monitor. It is shown that the entities included in the ER-diagram are indexed sequences. To navigate in the ER-diagram, functions are proposed that allow you to find an element of a set by its index in the task profile, and vice versa - to find the index of a given element of the set. The calculation of the time spent by the user in finding the interface elements on the monitor is performed using Hick's law.

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