Abstract: A method for automatic conducting of a straightening process for an object to be straightened, such as sheet metal, strips, sections, pipes, and in particular for wire-like or multiwire-like objects that are to be straightened, in a straightening device or a levelling machine with at least one mangle roll which can be adjusted by an actuator. In accordance with this invention, a process simulation model of a straightening process that is to be conducted, and a process simulation program are set up, and the latter gives directly “online” the settings of the adjustable mangle rolls.