The NAMUR Pyramid automation structure is generally accepted and supports long term reliability of operation. But these systems lack openness; new technologies are implemented with delays, and the costs are high. In view of the rapid developments in the Internet of Things, Industrie 4.0, mobile devices and big data, this obstructs innovations.
The NAMUR Open Architecture (NOA) concept offers possibilities to enable innovative solutions for new and existing plants. The process control core remains largely unaffected. The basic idea is an open interface, e.g. OPC UA, between the existing core process control domain and the monitoring and optimization domain. Alternatively, a second communication channel can directly access information from existing field devices.