Abstract
In this paper some plant-wide control concepts are discussed based on an extensive thermodynamic state function, the so-called qualifying potential. The dynamic plant behavior with respect to the production objective is represented by the balance equation of the qualifying potential. This concept enables an information compression and forms the basis for plant-wide quality control. The complex plant-wide control task is split into two parts using a hierarchical control concept with two levels. This facilitates the controller design and allows to achieve quality assurance of the end product. Connections between process control and process design are pointed out and the usefulness of the qualifying potential for both is shown.
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