“…First, the flexibility offered by cloud computing platforms and virtualization allows the outline of advanced IIoT technologies, and to obtain measurable progress. The P4 dimension reflecting virtualization has received less interest in the studies (29 papers only discussed the issues related to P4) [ 41,74,77,80,82,83,88,89,91,94,96,98,99,101,104,105,107,108,111,112,114,116,118,120,[131][132][133]135]. This could be because it is necessary to start with pilot projects to define the SM benefits, and competencies and considerably respect timelines for future phases.…”