This paper proposes the methodology of analyzing the team working process using the information of factory and each worker's location. Analyzing the team working process is done through the following processes:(1) get the data of operation and each worker's location by using active RFID sensor, (2) evaluate the team working process by comparing with the representative sensor data, and (3) extract the error process automatically by using the result of evaluating team working process. The proposed methodology was applied to changing ladle operation in continuous casting. Results show that the methodology can evaluate the team working process normally and extract the unusual process which should be reported to factory manager. In addition, this method can get the new knowledge about changing ladle operation. For example, the quality of production would be poor if no worker does monitoring on pulpit.
