Method for monitoring a state of a physical passenger transport system using an updated digital replica dataset UDRD which comprises characterizing properties of components of the physical passenger transport system in a machine-processable manner after assembly and installation thereof in a building , wherein at least one detection device is arranged in the physical passenger transport system and detects changes in at least one characterizing property that is caused by wear on a traveling physical component of the physical passenger transport system , wherein the UDRD is generated by: • creating a commissioning digital replica dataset from component model datasets (114 - NN) having target data which reproduce characterizing properties of components of the passenger transport system in a target configuration; • creating a completion digital replica dataset based on the commissioning digital replica dataset by measuring actual data which reproduce characterizing properties of components of the physical passenger transport system in the actual configuration of the passenger transport system immediately after the assembly and installation thereof in a structure , and replacing target data in the commissioning digital replica dataset with corresponding actual data; • creating and continuously updating the UDRD on the basis of the completion digital replica dataset by modifying the completion digital replica dataset during the operation of the physical passenger transport system , taking into account measured values acquired by the detection device which reproduce changes in characterizing properties of traveling components of the physical passenger transport system during its operation; by these changes being transmitted to the UDRD as measurement data and characterizing properties of the component model datasets (114 - NN) affected by the transmitted measurement data being updated accordingly; characterized in that • the measurement data transmitted by the detection device are stored with time information in a log file , and in that • a change trend in the measured values is determined by means of statistical methods using the measurement data stored in the log file and operating data stored in the log file . • creating a commissioning digital replica dataset from component model datasets (114 - NN) having target data which reproduce characterizing properties of components of the passenger transport system in a target configuration; • creating a completion digital replica dataset based on the commissioning digital replica dataset by measuring actual data which reproduce characterizing properties of components of the physical passenger transport system in the actual configuration of the passenger transport system immediately after the assembly and installation thereof in a structure , and replacing target data in the commissioning digital replica dataset with corresponding actual data; • creating and continuously updating the UDRD on the basis of the completion digital replica dataset by modifying the completion digital replica dataset during the operation of the physical passenger transport system , taking into account measured values acquired by the detection device which reproduce changes in characterizing properties of traveling components of the physical passenger transport system during its operation; by these changes being transmitted to the UDRD as measurement data and characterizing properties of the component model datasets (114 - NN) affected by the transmitted measurement data being updated accordingly; characterized in that • the measurement data transmitted by the detection device are stored with time information in a log file , and in that • a change trend in the measured values is determined by means of statistical methods using the measurement data stored in the log file and operating data stored in the log file . <EOS>