BPM, EAM and IT model: the triad of integrated modeling

Models should provide answers. However, it becomes particularly complex if not only a domain such as “classic” Business Process Management (BPM) is to be considered, but also related topics such as Enterprise Architecture (EA) and the technical-technical IT modeling in be linked to an “integrated model”. The connection of different modeling domains has a very high potential for use, but unfortunately it is also difficult to design. How can the domains BPM, EAM and technical IT modeling be integrated?