“…The idea of an intelligent factory can be defined in terms of Industry 4.0 concepts by applying the above areas. Theoretically, it is based on nine technological pillars: the industrial Internet of Things (IoT) in the form of CPS, big data and analytics, product lifecycle management (PLM) systems, digital manufacturing, cloud computing, augmented reality, autonomous or collaborative robots, additive manufacturing and cybersecurity [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”