.
Statistical analysis using Kohonen's ANNs demonstrated that the
in the majority of declarations the surveyed businesses did not
applied exclusively one method of verification but used two or even
three verification methods (Table 6). The two most common
methods declared together were internal audits and review of
complaints (cluster of 7 businesses, i.e. 10.6%), and the three combined
methods included internal audits, review of complaints and
checking the documentation (also 7 businesses). Business operators
which did not conduct audits declared other methods of
verification such as review of complaints and checking the documentation
(cluster of 6 businesses, i.e. 9%). The analysis also identified
cluster of business operators that used together all of the
verification methods listed in the questionnaire (6 businesses. i.e.
9%)