Reformulations
of Mixed-Integer Programming Continuous-Time
Models for Chemical Production Scheduling
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Abstract
Although several optimization models
have been proposed for chemical
production scheduling, there is still a need for effective solution
methods. Accordingly, the goal of this work is to present different
reformulations of representative continuous-time models by introducing
an explicit variable for the number of batches of a given task. This
idea, which has been successfully applied to discrete-time models,
results in significant computational enhancement. We discuss how different
objective functions benefit from particular reformulations and show
significant improvements by means of an extensive computational study
that includes several instances containing different process networks
and scheduling horizons