An analysis device for monitoring an operational state of an industrial system performing an industrial task, the industrial system including multiple industrial devices (2 - 5) interacting to perform the industrial task, the analysis device including: a reception unit configured to receive sensor data, the sensor data representing an event characterizing an operational state of one or several of the industrial devices (2 - 5); a prioritization unit configured to determine a priority of the sensor data based on a prestored industrial device priority information associated to the one or several industrial devices (2 - 5) characterized by the sensor data; and a labelling unit configured to autonomously classify the event represented by the sensor data into one of multiple predefined event categories using a classification algorithm and to autonomously create a label for the sensor data, the label including the priority of the sensor data determined by the prioritization unit and the event category into which the labelling unit has classified the sensor data; wherein the prioritization unit is configured to determine the priority of the sensor data further based on: a prestored frequency of occurrence of the event represented by the sensor data, a prestored frequency of occurrence of the event category into which the labelling unit has classified the event represented by the sensor data, and/or a prestored loss function indicating an impact of previous events of the same event category as the event represented by the sensor data on the industrial system and/or on at least one of the industrial devices (2 - 5); and wherein the analysis device includes an anomaly detection unit configured to detect an anomaly in the operational state of the industrial system and/or of the industrial devices (2 - 5) based on the label using an anomaly algorithm. a reception unit configured to receive sensor data, the sensor data representing an event characterizing an operational state of one or several of the industrial devices (2 - 5); a prioritization unit configured to determine a priority of the sensor data based on a prestored industrial device priority information associated to the one or several industrial devices (2 - 5) characterized by the sensor data; and a labelling unit configured to autonomously classify the event represented by the sensor data into one of multiple predefined event categories using a classification algorithm and to autonomously create a label for the sensor data, the label including the priority of the sensor data determined by the prioritization unit and the event category into which the labelling unit has classified the sensor data; wherein the prioritization unit is configured to determine the priority of the sensor data further based on: a prestored frequency of occurrence of the event represented by the sensor data, a prestored frequency of occurrence of the event category into which the labelling unit has classified the event represented by the sensor data, and/or a prestored loss function indicating an impact of previous events of the same event category as the event represented by the sensor data on the industrial system and/or on at least one of the industrial devices (2 - 5); and wherein the analysis device includes an anomaly detection unit configured to detect an anomaly in the operational state of the industrial system and/or of the industrial devices (2 - 5) based on the label using an anomaly algorithm. a prestored frequency of occurrence of the event represented by the sensor data, a prestored frequency of occurrence of the event category into which the labelling unit has classified the event represented by the sensor data, and/or a prestored loss function indicating an impact of previous events of the same event category as the event represented by the sensor data on the industrial system and/or on at least one of the industrial devices (2 - 5); and wherein the analysis device includes an anomaly detection unit configured to detect an anomaly in the operational state of the industrial system and/or of the industrial devices (2 - 5) based on the label using an anomaly algorithm.