Method for monitoring an installation having a network topology, in which - a plurality of measuring points of the installation are used to capture measured values characterizing a state of the installation at the respective measuring point; - the captured measured values are transmitted to a supervisory control device that uses the measured values to ascertain state values that indicate a state at prescribed state observation points of the installation; and - the state values are used to produce a visual display of the state of the installation; - the supervisory control device provides state threshold values for at least selected instances of the state observation points, which state threshold values delimit an admissible operating area for the installation and the respective state observation point; - the state values ascertained for the selected state observation points are compared with the associated state threshold values; - the supervisory control device produces a representation (23, 24, 25, 91, 92, 93); - the supervisory control device is also used to produce a visual display of a network topology of the installation and to display it by means of a display device; - at least the state values for which a graphical representation is produced are each assigned a piece of location information indicating the position of their respective state observation point in the installation; and - the respective graphical representation (23, 24, 25, 91, 92, 93) is presented, using the location information, at that respective point of the displayed network topology that corresponds to its position in the installation, characterized in that the representation is graphical, and in that the representation is produced exclusively for those state values for which a violation of the associated state threshold value that has already taken place or is imminent is identified, and in that - the graphical representation (23, 24, 25) having a circular or elliptical base area, the diameter of which is dependent on the magnitude of the respective state value in comparison with the associated state threshold value, is produced. - a plurality of measuring points of the installation are used to capture measured values characterizing a state of the installation at the respective measuring point; - the captured measured values are transmitted to a supervisory control device that uses the measured values to ascertain state values that indicate a state at prescribed state observation points of the installation; and - the state values are used to produce a visual display of the state of the installation; - the supervisory control device provides state threshold values for at least selected instances of the state observation points, which state threshold values delimit an admissible operating area for the installation and the respective state observation point; - the state values ascertained for the selected state observation points are compared with the associated state threshold values; - the supervisory control device produces a representation (23, 24, 25, 91, 92, 93); - the supervisory control device is also used to produce a visual display of a network topology of the installation and to display it by means of a display device; - at least the state values for which a graphical representation is produced are each assigned a piece of location information indicating the position of their respective state observation point in the installation; and - the respective graphical representation (23, 24, 25, 91, 92, 93) is presented, using the location information, at that respective point of the displayed network topology that corresponds to its position in the installation, - the graphical representation (23, 24, 25) having a circular or elliptical base area, the diameter of which is dependent on the magnitude of the respective state value in comparison with the associated state threshold value, is produced.