Fig. 10From: DD-KARB: data-driven compliance to quality by rule based benchmarkingThe histogram analysis of quality score levels (obtained from user judgments) about “absolute quality” for 10 different messenger applications. Every messenger application has five data points for the numeration of 1—very poor, 2—poor, 3—moderate, 4—good and 5—excellent quality scores. These scores reflect the user experience point of view to the quality of messengersBack to article page