Combining SHAP and Causal Analysis for Interpretable Fault Detection in Industrial Processes

TL;DR

This paper introduces a novel fault detection framework combining SHAP explanations and causal analysis to improve interpretability and accuracy in complex industrial processes.

Contribution

It presents an innovative approach that integrates SHAP and causal graphs for transparent fault detection, a novel combination in industrial process monitoring.

Findings

Enhanced fault detection accuracy

Identified key process features driving faults

Provided clear insights into fault propagation mechanisms

Abstract

Industrial processes generate complex data that challenge fault detection systems, often yielding opaque or underwhelming results despite advanced machine learning techniques. This study tackles such difficulties using the Tennessee Eastman Process, a well-established benchmark known for its intricate dynamics, to develop an innovative fault detection framework. Initial attempts with standard models revealed limitations in both performance and interpretability, prompting a shift toward a more tractable approach. By employing SHAP (SHapley Additive exPlanations), we transform the problem into a more manageable and transparent form, pinpointing the most critical process features driving fault predictions. This reduction in complexity unlocks the ability to apply causal analysis through Directed Acyclic Graphs, generated by multiple algorithms, to uncover the underlying mechanisms of fault propagation. The resulting causal structures align strikingly with SHAP findings, consistently highlighting key process elements-like cooling and separation systems-as pivotal to fault development. Together, these methods not only enhance detection accuracy but also provide operators with clear, actionable insights into fault origins, a synergy that, to our knowledge, has not been previously explored in this context. This dual approach bridges predictive power with causal understanding, offering a robust tool for monitoring complex manufacturing environments and paving the way for smarter, more interpretable fault detection in industrial systems.