Explaining Reinforcement Learning Decisions in Self-adaptive Systems

Abstract:Reinforcement Learning (RL) has been extensively used in autonomous and self-* systems, but RL policies, especially deep RL ones relying on neural networks, lack transparency and are difficult to understand. This can lead to diminished user trust, and makes for a more challenging verification of systems. To address this challenge, this paper introduces Explanations using Alternative Realities for Reinforcement Learning (EARL), a Python library to produce counterfactual explanations in RL settings. This library allows the user to produce explanations by exploring What-if scenarios to clarify agent behavior by comparing possible outcomes. Counterfactual explanations have been shown to be intuitive and user-friendly in psychology research, but have only recently been explored in RL, with existing implementations usually limited to toy examples and benchmarks. EARL supports counterfactual explanation generation in realistic RL-based self-adaptive systems. To demonstrate its applicability, we demonstrate its use in a simulation of CitiBikes, a self-adaptive bike-sharing system, and we provide evaluations showing how it performs in real applications.

Accepted in the 20th Colombian Computing Congress. 13 pages, 2 figures, 3 tables

Machine Learning (cs.LG); Artificial Intelligence (cs.AI)

arXiv:2608.14620 [cs.LG]

(or arXiv:2608.14620v1 [cs.LG] for this version)

https://doi.org/10.48550/arXiv.2608.14620 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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