The Complexity of the Parallel Machine Scheduling about Tardiness
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Graphical Abstract
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Abstract
In this paper, the complexity of the parallel machine scheduling with two servers was studied. It is proved that the P3,S2/s_i=1/L_ max problem is strong NP-hard. Then it is also proved that the other two problems P3,S2/p_i=1/L_ max and P3,S2/s_i=1,d_i=d/L_ max are NP-hard.
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