The interrelations found by e.g. data mining of the historical data at the quality gates can be utilized on different levels of control. On the one hand, single processes can be enhanced, on the other hand, these interrelations enable cross-process control that utilizes the knowledge regarding the process chain to control the downstream processes based on the intermediate product features and process parameters. Currently, these approaches are mainly found in production but not recycling. The main focus is often the relationship between process parameters and intermediate product features as well as the prediction of features . This is the main basis for the mentioned quality gates building a foundation for decision support within the production. In contrast to production, recycling processes follow more variable routes since different chemical and physical techniques of material extraction are usually necessary . The current focus is still on understanding the individual processes.