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Title: Scheduling of single-stage noncontinous processes
Keywords: scheduling, multiproduct, batch, semicontinuous, MILP, steppers
Issue Date: 20-Apr-2005
Citation: BALLA GANESH (2005-04-20). Scheduling of single-stage noncontinous processes. ScholarBank@NUS Repository.
Abstract: Short-term scheduling of single stage noncontinuous plants with parallel lines/units is considered with the release times for units, order due dates and sequence-dependent setup times. MILP models are developed for both batch and semicontinuous processes with one or multiple due dates using slot-based time representation. MILP models are also formulated using event-based approach to study the effect of decoupling on model performance. A comparison is drawn between the above two continuous-time formulations with a few examples. In addition, two models are proposed which accommodate multiple batches in single slot and reduce the binary variables and solution times. The effect of big-M on the performance of a model is also discussed. Finally, an application of our work is demonstrated for scheduling stepper machines with uncertainties in the photolithography station, one of the important processes in semiconductor manufacturing.
Appears in Collections:Master's Theses (Open)

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