24.7 Conclusions
In this chapter, we aimed to provide an overview of multi-criteria recommender
systems. We first defined the recommendation problem as an MCDM problem and
reviewed the MCDM methods and techniques that can support the implementation
of multi-criteria recommenders. Then, we focused on the category of multi-criteria
rating recommenders, i.e., techniques that provide recommendations by modelling
a user’s utility for an item as a vector of ratings along several criteria. We reviewed
current techniques that use multi-criteria ratings for calculating the rating prediction