Investigation on enterprise processes according to a hierarchical model compliant with the I4.0 paradigm For the manufacturing, under the tendency of Industry 4.0, everything is going to connect because of the continuous development of automatic control and advanced sensor. Also we point out the concept of ‘Digital Factory’ which uses digital technology for modeling, communications and to operate the manufacturing process. With this approach, we totally monitor, control and optimize all the production variables in the manufacturing system in real-time. In this paper, we introduce a practical automobile wheel hub production line. We will simulate the hub production line to describe the hierarchical model working.