We have replaced the word "indicator" with "aspect" to eliminate possible confusion with the 5 indicators in the B Impact Assessment Model (Figure 6). The text has been completely revised and the word 'indices' has been used as the standard. The word ‘chapter’ has been replaced by ‘section’. Finally, we are thankful for the good appreciation to the many models studied in our research.
The sentence from line 137 to line 138 isn’t clear when I saw Figure 6. The authors could use a standard for a plural of index word, ‘indices’ (345) or ‘indexes’ (362). In line 384 the authors should substitute ‘chapter’ for ‘section’. The authors presented and analyzed the variables/areas of certification with many models, it is interesting and is a basis for analysis in the next section.