Automated repair of scoring rules in constraint-based recommender systems

  • Authors:
  • Alexander Felfernig;Stefan Schippel;Gerhard Leitner;Florian Reinfrank;Klaus Isak;Monika Mandl;Paul Blazek;Gerald Ninaus

  • Affiliations:
  • Institute for Software Technology, Graz University of Technology, Graz, Austria. E-mails: {alexander.felfernig, florian.reinfrank, klaus.isak, monika.mandl, gerald.ninaus}@ist.tugraz.at;Institute for Applied Informatics, Alpen-Adria University Klagenfurt, Klagenfurt, Austria. E-mail: Stefan.Schippel@zh-tech.at;Institute for Informatics Systems, Alpen-Adria University Klagenfurt, Klagenfurt, Austria. E-mail: gerhard.leitner@aau.at;Institute for Software Technology, Graz University of Technology, Graz, Austria. E-mails: {alexander.felfernig, florian.reinfrank, klaus.isak, monika.mandl, gerald.ninaus}@ist.tugraz.at;Institute for Software Technology, Graz University of Technology, Graz, Austria. E-mails: {alexander.felfernig, florian.reinfrank, klaus.isak, monika.mandl, gerald.ninaus}@ist.tugraz.at;Institute for Software Technology, Graz University of Technology, Graz, Austria. E-mails: {alexander.felfernig, florian.reinfrank, klaus.isak, monika.mandl, gerald.ninaus}@ist.tugraz.at;cyLEDGE Media GmbH, Vienna, Austria. E-mail: p.blazek@cyledge.com;Institute for Software Technology, Graz University of Technology, Graz, Austria. E-mails: {alexander.felfernig, florian.reinfrank, klaus.isak, monika.mandl, gerald.ninaus}@ist.tugraz.at

  • Venue:
  • AI Communications - Intelligent Engineering Techniques for Knowledge Bases
  • Year:
  • 2013

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Abstract

Constraint-based recommender systems support customers in preference construction processes related to complex products and services. In this context, utility constraints scoring rules play an important role. They determine the order in which items products and services are presented to customers. In many cases utility constraints are faulty, i.e., calculate rankings which are not expected and accepted by marketing and sales experts. The adaptation of these constraints is extremely time-consuming and often an error-prone process. We present an approach to the automated adaptation of utility constraint sets which is based on solutions for nonlinear optimization problems. This approach increases the applicability of constraint-based recommendation technologies by allowing the automated reproduction of example item rankings specified by marketing and sales experts.