“…Hou and Li [16] study the different disturbance events that can arise in the steelmaking process classifying them attending to the origin of the event: internal to the steelshop (machine breakdowns, steel grade variations) and external to the steelshop (urgent orders, unavailability of slabs). Worapradya and Thanakijkasem [17] divide the main daily disruptions events that can happen in this environment into 4 groups: machine failure, rush orders, excessive defects during an operation and order cancellations. Tang et al [18] consider the differentiation of real-time events affecting the steel making phase between resource-related and job-related but propose also a third category, which are the quality-related (processing time changes, steel grade changes, process route changes).…”