Method for operating and observing a technical plant to be controlled, wherein - access authorisations are stored in an operator server of the operator system describing which process objects an operator who is logged on to that operator system is allowed to have read and/or write access to, - a process map having process map modules belonging to the process objects is stored in the operator server , - block symbols (24 to 31), belonging to the process objects, of plant schematics, and also faceplates belonging to the process objects, are stored in the operator server , - a node which can be selected by an operator is entered in an equipment hierarchy for the respective plant schematic for the purpose of opening the respective plant schematic for display on an operator client of the operator system , - automation modules belonging to the process objects are stored in an automation device , wherein the automation modules transmit messages to the operator server at runtime of the automation device , characterised in that in the event that messages are transmitted to the operator server , - a determination is made on the basis of the messages as to which of the process objects are generating messages, - a determination is made on the basis of the stored access authorisations as to whether the operator who is logged on to the operator system is authorised to access said process objects generating messages, - a path name , describing the path of the process object generating a message in the equipment hierarchy in each case, is read out in the respective process map modules , and - in the event that the operator who is logged on is authorised to operate the process objects generating messages, and in the event that a message node in the equipment hierarchy is selected by the operator who is logged on, the block symbols of the process objects generating the message are displayed. - access authorisations are stored in an operator server of the operator system describing which process objects an operator who is logged on to that operator system is allowed to have read and/or write access to, - a process map having process map modules belonging to the process objects is stored in the operator server , - block symbols (24 to 31), belonging to the process objects, of plant schematics, and also faceplates belonging to the process objects, are stored in the operator server , - a node which can be selected by an operator is entered in an equipment hierarchy for the respective plant schematic for the purpose of opening the respective plant schematic for display on an operator client of the operator system , - automation modules belonging to the process objects are stored in an automation device , wherein the automation modules transmit messages to the operator server at runtime of the automation device , - a determination is made on the basis of the messages as to which of the process objects are generating messages, - a determination is made on the basis of the stored access authorisations as to whether the operator who is logged on to the operator system is authorised to access said process objects generating messages, - a path name , describing the path of the process object generating a message in the equipment hierarchy in each case, is read out in the respective process map modules , and - in the event that the operator who is logged on is authorised to operate the process objects generating messages, and in the event that a message node in the equipment hierarchy is selected by the operator who is logged on, the block symbols of the process objects generating the message are displayed. <EOS>