A General Network-based Representation for Process Scheduling

GIMÉNEZ, DIEGO MARCELO; HENNING, GABRIELA; MARAVELIAS, CHRISTOS

Nashville

Conferencia; AIChE 2009 Annual Meeting; 2009

American Institution of Chemical Engineers

In pervious contributions we have presented a new network-based continuous-time representation for the short-term scheduling of batch processes, which overcomes numerous shortcomings of existing approaches. In this work, we discuss how this representation can be extended to address aspects such as: (i) preventive maintenance activities on unary resources (e.g., processing and storage units) that were planned ahead of time; (ii) resource-constrained changeover activities on processing and shared storage units; (iii) non-instantaneous resource-constrained material transfer activities; (iv) intermediate deliveries of raw materials and shipments of finished products at predefined times; and (v) scenarios where part of the schedule is fixed because it has been programmed in the previous scheduling horizon. The proposed integrated framework can be used to address a wide variety of process scheduling problems, many of which are intractable with existing tools.