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Priority-rule based scheduling of chemical batch processes

Priority-rule based scheduling of chemical batch processes,10.1016/S1570-7946(06)80369-X,N. Trautmann,C. Schwindt

Priority-rule based scheduling of chemical batch processes  
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We present a priority-rule based method for batch production scheduling in the process industries. The problem consists in scheduling a given set of operations on a multipurpose batch plant such that the makespan is minimized. Each operation consumes a given amount of input materials at its start and yields a given amount of output materials at its completion. An initial, a minimum, and a maximum stock level are specified for each material. Some materials are perishable and thus cannot be stored. The operations may be executed on alternative processing units. Processing units require material availability and storage capacity, classical schedule-generation schemes cannot be applied to this problem. That is why we propose a new two-phase approach dealing with the two types of constraints separately.
Published in 2006.
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