Large companies usually keep track of internal processes by continuously updating data in a database in the form of logs. They are crucial to carry out conformance checks and monitor whether a case is progressing as expected and similarly to what has happened in the past or, in alternative, detect any errors or unexpected loops that can negatively affect the performances of a system. Predictive process monitoring collects a set of techniques and methodologies to analyze event logs, with the purpose of making predictions on running cases. Being able to predict in real time the remaining time until the completion of a case is crucial to allow the user to intervene promptly.