in conclusive results, Jensen supports the hypothesis, albeit in a limited sphere of application.
Satisfaction factors have been classified still differently in studies on consumption (Matzler and Sauerwein, 2002), following the works of Kano (1984), Kano et al. (1984), Brandt (1987) and Vavra (1997). This approach groups the attributes of a product or service into three categories, depending on the different ways in which their performance can influence consumer satisfaction