Sebastian Kerber documents the development of a reference process model for the virtual safeguarding of production planning at an automotive manufacturer. The starting point for the examination is the use of digital factory overall models. The method describes a systematic generation, testing, and documentation of the required data basis, taking into account project-specific influencing factors. The resulting areas of responsibility are assigned roles and responsibilities. A temporal classification within the project workflow is made through process phases related to the product development process. The author's results provide a general, adaptable, and reusable design recommendation for the application of the method.