Garzone’s paper starts by pointing out the lack of a sufficiently general theoretical model to encompass the different dimensions and variables involved in the concept of quality, leaving an area of epistemological uncertainty. Against this background, the paper suggests that a possible solution might be the concept of norms as defined by Gideon Toury (1980). This could provide a flexible framework for research on interpretation quality, and afford a heuristic instrument to account for variability in criteria and standards – not only as perceived and applied by interpreters and users, but also with reference to the situation and the social (sub-)groups involved in the interpreting event.