Balancing accuracy while establishing a trade-off optimization with fairness and serendipity remains a challenging problem in commercial recommender systems. However, recent multi-objective recommendation methods have often overlooked the need to investigate pleasantly surprising items, thereby mitigating popularity bias and ensuring the equitable inclusion of items in the recommendation list. Hence, this study develops the objective functions for Fairness, Accuracy, and Serendipity and integrates them into a proposed unified Multi-Objective Evolutionary Algorithm-Based Recommendation Framework (FAS-MOEA). The proposed objective functions for accuracy ensure the balanced inclusion of long-tail and popular items through weighted evaluation. The fairness-based objective function incorporates genre-aware fairness, aligning recommendation distributions with both global and user-specific genre profiles. The serendipity-based proposed objective function learns implicit, context-sensitive preferences for novel yet relevant items. Lastly, the proposed framework establishes the balanced trade-off among these competing objectives to generate the Pareto optimal recommendation solution. The proposed models' validation demonstrates substantial improvement over the competing models on three benchmark datasets, MovieLens 100K, MovieLens 1M, and Amazon Electronics (5-core), attaining an enhancement of 27.21% in F1-score, 8.44% in fairness, and 16.66% in serendipity score. The generated Pareto front exhibits the models' ability to navigate trade-offs among these competing goals and develop an accurate, fair, and pleasantly surprising recommendation.
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