Industry 4.0, Internet of Things (IoT) and Big Data are widely used nowadays. However, it is not always obvious what these terms means and which potential they offer, in particular, for the process industry. On the cusp of the fourth industrial revolution, these technologies must be used and integrated into production plant processes, thus creating Smart Factory. Within this networked factory, software, mechanics, electronics and humans are seamlessly interconnected along the value-added chain. In order to meet this vision, new requirements are necessary for the entire process industry. For Industry 4.0 in the processing industry, ProLeiT represents an integral part of the firm's process control systems and MES solutions. Networked and self-optimizing systems can make autonomous decisions based on predefined rules, in less time and with lower costs.