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In this paper, we introduce a continuous galvanizing line in a steel plant which is one of the biggest iron and steel enterprises of the world. The continuous galvanizing line we research produces principally two kinds of coils, inner coils and outer coils. Due to the technical constraint, outer coils can not be produced continuously more than a specified number. So the inner coils must be inserted...
Hybrid flow shop scheduling problems are quite common in process industries. In this paper we study the hybrid flow shop (HFS) problem with parallel identical machines at each stage. The objective is to minimize the total weighted completion times of the jobs. We formulate the problem as an integer programming formulation. Since the problem has proven to be NP-hard, an algorithm based on tabu search...
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