All definitions refer to the period from 2014 to 2017. It is important to see basics and understand the various opinions. See the four below
First, «Industry 4.0» provides pervasive digitalization of all physical assets and their integration into the digital ecosystem along with partners involved in the value chain.
The other definition: Industry digitalization through integration of sensors in the components of products and in production equipment, the use of cyberphysical systems, data analysis.
Third one is by another author formulated as: The transformation of production, based on advanced technologies and involving the connection in a single system of sensors, equipment, products and IT systems along the chain of creation, value both within a single enterprise and beyond its limits.
Last and not least. Technological evolution, that suggests transition from embedded systems to cyber-physical systems. The paradigm shift from centralized to decentralized. Interaction of real and virtual worlds. Coimecting embedded systems of production and “smart” production processes.
