Prior to appliance of the role hierarchy miner technique (i.e., using ProM process mining tool) we stored, captured and collected an event log (including the information about the patients’ ID number, details about the patients’ diseases, details about the wards and sections patients have undergone during the treatment process, details about the relevant resource in charge of each task during each healing process, and some other attributes about the patients/diseases) from an estate governmental hospital in Bangkok, Thailand.