1. A device for the simulation of the configuration and the process in a development environment, comprising a development system ( 1 ) for a test bench ( 2 ) for a unit under test and a simulation device ( 6 ), wherein a real automation device ( 4 ) is provided in the development system ( 1 ) for the operation of the test bench ( 2 ), the test bench ( 2 ) and the unit under test are simulated in the simulation device ( 6 ) by means of a test model ( 20 ) generating simulation data ( 22 , 24 ), and the automation device ( 4 ) and the simulation device ( 6 ) are connected to each other via real interfaces ( 8 ) of the development system ( 1 ), and the automation device ( 4 ) processes generated simulation data ( 22 ), including a number of real development tools ( 5 ) in the development system ( 1 ), and a number of device models ( 7 ) generating development data ( 23 , 25 ) and simulating the behavior of data collection devices in the simulation device ( 6 ), wherein the device models ( 7 ) at least partially process simulation data ( 24 ) from the test model, and the development tools ( 5 ) are connected to the automation device ( 4 ) and/or to the simulation device ( 6 ) via real interfaces, and the development tools ( 5 ) process the development data ( 23 , 25 ).