Method of processing a metallic transition slab or transition billet with a chemical analysis, which is locally variable in the transition slab or billet, to form an intermediate or a finished product with a target corridor for the mechanical properties and a target dimension in reshaping equipment, particularly in a rolling train, wherein the variable chemical analysis is brought into being by a selective process or results from a process error in a preceding method step in the production of the transition slab or billet, comprising at least the work steps of: - heating and/or maintaining the transition slab or billet to or at a target temperature; - reshaping the heated transition slab or billet to form an intermediate or finished product; - cooling the intermediate or finished product; wherein the respective target process values for the individual units participating in the processing are predetermined by a superordinate control or regulation, characterised in that - the local chemical analysis B x,y,z of the transition slab or billet is determined and/or calculated at at least two positions by measurement and/or a model at least prior to the first pass; - a reshaping process model determines the local chemical analysis F x,y,z of the intermediate or finished product from the local chemical analysis B x,y,z and a planned reshaping; - a material process model, particularly a structural model, determines the mechanical properties of the intermediate or finished product in dependence on the local chemical analysis F x,y,z of the intermediate or finished product and target process parameters of the rolling train; - a processing process model adapts the target process parameters of the reshaping train, particularly the temperature plot in the rolling train, the pass reduction of the individual reshaping steps, the cooling intensity or the cooling location within the rolling train and thus the local structural development in the course of processing, in such a way that the mechanical properties of the intermediate or finished product lie in a planned target corridor, and transfers these target process parameters to the control or regulation as target values for the processing. - heating and/or maintaining the transition slab or billet to or at a target temperature; - reshaping the heated transition slab or billet to form an intermediate or finished product; - cooling the intermediate or finished product; wherein the respective target process values for the individual units participating in the processing are predetermined by a superordinate control or regulation, characterised in that - the local chemical analysis B x,y,z of the transition slab or billet is determined and/or calculated at at least two positions by measurement and/or a model at least prior to the first pass; - a reshaping process model determines the local chemical analysis F x,y,z of the intermediate or finished product from the local chemical analysis B x,y,z and a planned reshaping; - a material process model, particularly a structural model, determines the mechanical properties of the intermediate or finished product in dependence on the local chemical analysis F x,y,z of the intermediate or finished product and target process parameters of the rolling train; - a processing process model adapts the target process parameters of the reshaping train, particularly the temperature plot in the rolling train, the pass reduction of the individual reshaping steps, the cooling intensity or the cooling location within the rolling train and thus the local structural development in the course of processing, in such a way that the mechanical properties of the intermediate or finished product lie in a planned target corridor, and transfers these target process parameters to the control or regulation as target values for the processing. - the local chemical analysis B x,y,z of the transition slab or billet is determined and/or calculated at at least two positions by measurement and/or a model at least prior to the first pass; - a reshaping process model determines the local chemical analysis F x,y,z of the intermediate or finished product from the local chemical analysis B x,y,z and a planned reshaping; - a material process model, particularly a structural model, determines the mechanical properties of the intermediate or finished product in dependence on the local chemical analysis F x,y,z of the intermediate or finished product and target process parameters of the rolling train; - a processing process model adapts the target process parameters of the reshaping train, particularly the temperature plot in the rolling train, the pass reduction of the individual reshaping steps, the cooling intensity or the cooling location within the rolling train and thus the local structural development in the course of processing, in such a way that the mechanical properties of the intermediate or finished product lie in a planned target corridor, and transfers these target process parameters to the control or regulation as target values for the processing.