Population Based Training (PBT) is an efficient hyperparameter optimization algorithm. PBT is a single-objective algorithm, but many real-world hyperparameter optimization problems involve two or more conflicting objectives. In this work, we therefore introduce a multi-objective version of PBT, MO-PBT. Our experiments on diverse multi-objective hyperparameter optimization problems (Precision/Recall, Accuracy/Fairness, Accuracy/Adversarial Robustness) show that MO-PBT outperforms random search, single-objective PBT, and the state-of-the-art multi-objective hyperparameter optimization algorithm MO-ASHA.

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40th International Conference on Machine Learning, PMLR 2023
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Dushatskiy, A, Chebykin, A, Alderliesten, T, & Bosman, P.A.N. (2023). Multi-objective population based training. In Proceedings of the 40th International Conference on Machine Learning, PMLR (pp. 8969–8989).