A method, for comparison of computer-based and data-processing models of a complex system, wherein a first model and a second model of the system are present, the models in each case model a system behaviour by way of predefined objects which represent activities and units within the system, and the method comprises the following steps: comparing both models and determining predefined objects of the first and the second model, which objects are associated with one another in each case, determining differences in attributes of predefined objects associated, with one another, and issuing the determined associations and differences to a user, wherein on comparison of the first and second model, the predefined, objects of the models are associated with one another on agreement of at least one of an absolute identifier of the objects, a qualified name in each case indicating and defining the objects under the designation of higher-order objects, and a type description of the predefined objects, wherein an agreement of an identifier has priority over an agreement of names, and a manual association has priority over the agreement of identifiers or of names.
