‘Type of customer complaints to chemical safety (pesticide residues and mycotoxins)’ and ‘type of customer complaints regarding visual quality’ of final products address the chemical safety related complaints. The latter include complaints regarding molds, rotten parts, bruises, etc. and give an important indication about problems in the quality system. Complaint registration provides feedback information from client companies about the operation of a quality assurance
system (Fouayzi et al., 2006; Garcia Martinez et al., 2006).
In the case of visual quality at the end of the supply chain, final consumer complaints can also be included.