Open Banking powered machine learning applications require novel robustness approaches to deal with challenging stress and failure scenarios. In this paper we propose an hierarchical fallback architecture for improving robustness in high risk machine learning applications with a focus in the financial domain. We define generic failure scenarios often found in online inference that depend on external data providers and we describe in detail how to apply the hierarchical fallback architecture to address them. Finally, we offer a real world example of its applicability in the industry for near-real time transactional fraud risk evaluation using Open Banking data and under extreme stress scenarios.
@article{arxiv.2501.17834,
title = {Hierarchical Fallback Architecture for High Risk Online Machine Learning Inference},
author = {Gustavo Polleti and Marlesson Santana and Felipe Sassi Del Sant and Eduardo Fontes},
journal= {arXiv preprint arXiv:2501.17834},
year = {2025}
}