Abstract
Informatization is considered an integral part of the functioning of the present-day society, which changes the nature of human-computer interaction and interface. It was substantiated that the interface quality determines the success of software marketing. It was shown that quality is estimated by both quantitative and qualitative indicators. Their calculation is complicated because of the lack of an analytical model of usability. Two Euclidean norms in the form of the root mean square value and the largest value of the modulus of the set of attribute values were proposed for continuous factor attributes. The problem was reduced to a geometric inequality by applying development into the Maclaurin series and a three-level comparator. Expressions of the upper and lower boundaries of the generalized index of interface quality represented through a set of attribute estimates were obtained. Expressions of the maximum possible absolute and relative errors represented by the method of recurrent approximation through the first and second derivative of the trend were substantiated. Representation of data in a plane with one common axis turned by a certain angle was applied which enabled fast viewing of all planes. It was shown that when all attributes have a quantitative dimension, it is sufficient to apply one norm to estimate the generalized index. However, in the case of quantitative and qualitative estimations, consecutive application of norms for the root mean square and the maximum possible value of the module solves the problem of comprehensive generalized estimation of interface quality. Experimental study of estimation of the generalized quality of the user interfaces for the MedInfoService medical information system which covers automation of curative treatment processes in outpatient clinics and hospitals was presented.
Highlights
Informatization as an integral part and means of functioning covers more and more areas of human activity
The following tasks were set: ‒ investigate the applicability of a unified metric to estimate a generalized index of quality according to the idea of using a three-level comparator and establish properties of the relative error for the formed trend; ‒ investigate the applicability of a unified metric to the synthesis of the trend of the generalized index of quality according to the idea of spatial representation with rotating coordinate planes for quantitative and qualitative indicators; ‒ conduct experimental tests of integral estimation of the user interface on the example of the MedInfoService medical information system covering automation of curative processes in outpatient clinics and hospitals for medical statistical reporting
Consecutive application of two Euclidean norms makes it possible to estimate the trend of the generalized quality index according to the idea of using a three-level comparator and establish properties of the relative error for the resulting trend of quantitative and qualitative indicators
Summary
Informatization as an integral part and means of functioning covers more and more areas of human activity. Today, testing as one of the mandatory components of the life cycle of any software does not end with the definition of integral indicators of interface quality because of the lack of an integral estimation method and a method of combining results of quantitative and qualitative estimates. In this regard, the formulation and solution of the problem of quantitative integral estimation of an interface according to quantitative and qualitative attributes of any software becomes a necessary part of the life cycle. Its solution ensures the success of software promotion estimation in the market, which substantiates the relevance of this scientific and applied problematics
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