When I am thinking about the security of manufacturing environments, I am usually focusing on IoT devices integrated into production lines. All the little sensors and actuators are often very difficult to secure. On the other hand, there is also "big software" that is used to manage manufacturing. One example is DELMIA Apriso by Dassault Systèmes. This type of Manufacturing Operation Management (MOM) or Manufacturing Execution System (MES) ties everything together and promises to connect factory floors to ERP systems.