PROSTEP has extended this toolbox to include PLM-specific criteria that can be aligned with the company's PLM capabilities. It examines, for example, the question of the form in which the product data is kept: Whether the 2D drawing is still the master, whether the data is file-based or managed in a PDM system, whether the 3D model is the master, or even whether there is already a digital master. PROSTEP considers the question of the availability of the product data to be so important because PLM and digital masters provide the basis for Industry 4.0 solutions. One of the most important measures for the introduction of Industry 4.0 is to do away with paper-based business processes and build end-to-end digital process chains. Because it is often engineering departments that provide the data for these processes, the digital master should be a key element in any company's Industry 4.0 strategy.