During his first intervention, the CEO of Numalis addressed several key topics such as AI standardisation. In the second, he presented the results of a project involving the "Upalgo" tool from the start-up Ezako and the "Saimple" tool from Numalis. The project concerned the detection and explanation of anomalies in the context of predictive maintenance. This project was born from a collaboration between Numalis and the start-up Ezako, which specialises in the analysis of time series by machine learning. Thanks to this collaboration, a predictive maintenance system can now detect an anomaly in a system and explain the causes.