Mixed-Integer Programming
Model and Tightening Methods
for Scheduling in General Chemical Production Environments
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Abstract
We develop a mixed-integer programming (MIP) model to
address chemical
production scheduling problems in a wide range of facilities, including
facilities with many different types of material handling restrictions
and a wide range of process characteristics. We first discuss how
material handling restrictions result in different types of production
environments and then show how these restrictions can be modeled.
We also present extensions for some important processing constraints
and briefly discuss how other constraints and characteristics can
be modeled. Finally, we present constraint propagation methods for
the calculation of parameters that are used to formulate tightening
constraints that lead to a substantial reduction of computational
requirements. The proposed model is the first to address the generalized
chemical production scheduling problem