An analysis of extreme values was carried out, using univariate and multivariate detection methods. The analysis resulted in the elimination of 34 univariate extreme values and 2 multivariate extreme values. All statistical analysis was repeated considering a database of 520 companies.
For a better and accurate model I recommend the authors to eliminate from the model the extreme value. For example in Fig 2. - workers values greater then 40, community greater than 58, environment 45, customers 46 (the bullets), in Fig 3 - values with global score greater than 130, in Fig. 5 also all the bullets. Then repeat all the statistical analysis.