Multi-Objective Recommendation

CP4285 Modern Recommendation Systems — Week 10 QR code for the Week 10 slide deckScan for the slides
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CP4285 Instruction Team

20 Oct 2026

01 Overview

Week 10: Multi-Objective Recommendation

Learning outcomes

  • Define non-accuracy objectives.
  • Measure diversity and novelty.
  • Design multi-objective recommenders.

  • Justify objective trade-offs.

02 Beyond Accuracy

Diversity, novelty, and coverage

TODO: add measures and objective trade-offs. ## Ethics Thread: Balancing stakeholder interests ::: {.callout-warning} TODO: identify competing values in optimization. ::: —

Summary

🔑 A better system may optimize more than one outcome.

Next week: exploration and online learning.