Provided is a method for checking system requirements of cyber-physical systems in a composite system, including creating a digital twin for at least one cyber-physical in each case; stipulating system requirements for each of the cyber-physical systems; storing the system requirements of the cyber-physical systems directly and/or indirectly in those digital twins which are each assigned to the cyber-physical system; and linking at least two or more digital twins The linked digital twins each communicate in pairs with one another and at least partially interchange their system requirements with each other; the digital twins compare the stored system requirements with the received system requirements; the digital twins adapt their system requirements on the basis of the comparison carried out with the received system requirements and can stipulate these as a new system requirement; and the digital twins communicate their newly stipulated system requirements to the other digital twins.