Process control system with - an engineering system (3a, 3b) for the project configuration of the hardware and software components of the process control system, - an operator system (2a, 2b) having a runtime component for the operator control and monitoring of a technical process, and - an archive system for the archiving of project configuration inputs of the engineering system (3a, 3b) and for the archiving of operator inputs in the operator system (2a, 2b), characterised in that - the engineering system (3a, 3b) is provided with a runtime component for storing engineering messages (22, 23, 24) corresponding with the project configuration inputs, wherein the runtime component of the engineering system (3a, 3b) is time-synchronised with the runtime component of the operator system (2a, 2b), - operator messages corresponding with the operator inputs are entered in the runtime component of the operator system (2a, 2b), and - the engineering system (3a, 3b) and the operator system (2a, 2b) each have an access component (12, 16) for writing their respective messages into the archive system and for reading out the engineering and operator messages stored in the archive system, - and the engineering system (3a, 3b) and the operator system (2a, 2b) each have a message interpreter (20, 21) for interpreting the engineering and the operator messages, which are each embodied, on the basis of correlation rules, to derive statements for the project engineer and/or the operator by way of correlation of the engineering messages and operator messages that are stored in the archive system, wherein the statements to be derived on the basis of the correlation rules and the engineering messages and operator messages responsible therefor are configured on a project-specific basis. - an engineering system (3a, 3b) for the project configuration of the hardware and software components of the process control system, - an operator system (2a, 2b) having a runtime component for the operator control and monitoring of a technical process, and - an archive system for the archiving of project configuration inputs of the engineering system (3a, 3b) and for the archiving of operator inputs in the operator system (2a, 2b), characterised in that - the engineering system (3a, 3b) is provided with a runtime component for storing engineering messages (22, 23, 24) corresponding with the project configuration inputs, wherein the runtime component of the engineering system (3a, 3b) is time-synchronised with the runtime component of the operator system (2a, 2b), - operator messages corresponding with the operator inputs are entered in the runtime component of the operator system (2a, 2b), and - the engineering system (3a, 3b) and the operator system (2a, 2b) each have an access component (12, 16) for writing their respective messages into the archive system and for reading out the engineering and operator messages stored in the archive system, - and the engineering system (3a, 3b) and the operator system (2a, 2b) each have a message interpreter (20, 21) for interpreting the engineering and the operator messages, which are each embodied, on the basis of correlation rules, to derive statements for the project engineer and/or the operator by way of correlation of the engineering messages and operator messages that are stored in the archive system, wherein the statements to be derived on the basis of the correlation rules and the engineering messages and operator messages responsible therefor are configured on a project-specific basis.