Operations Research Transactions ›› 2020, Vol. 24 ›› Issue (2): 131-144.doi: 10.15960/j.cnki.issn.1007-6093.2020.02.010

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Single-machine scheduling to minimize total weighted late work with positional due-indices

CHEN Rubing, YUAN Jinjiang*   

  1. School of Mathematics and Statistics, Zhengzhou University, Zhengzhou 450001, China
  • Received:2020-02-28 Published:2020-06-13
  • Supported by:
    The National Nature Science Foundation of China (Nos. 11671368, 11771406, 11971443)

Abstract: We consider the single-machine scheduling problem to minimize the total weighted late work with positional due-indices. In the problem, each job Jj has a positional due-index kj. That is, if Jj is the x-th job in a feasible schedule, then it is required that xkj. In this paper, we show that (i) the problem is binary NP-hard and can be solved in pseudo-polynomial-time if all the jobs have a common due date, (ii) the problem is unary NP-hard even if all the jobs have a unit weight.

Key words: single-machine scheduling, positional due-indices, NP-hard, late work

CLC Number: