Improvement of column generation method for railway crew scheduling problems

Yuki Muroi, Tatsushi Nishi, Masahiro Inuiguchi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The railway crew scheduling problem is to determine the assignment of crews to each traveling task to minimize the number of crews satisfying set covering constraints. Column generation method is often applied to solve railway crew scheduling problems. In this paper, we propose dual inequalities for railway crew scheduling problems to reduce the number of iterations in the column generation method. Three types of dual inequalities are generated from railway timetable data and they are added to the restricted master problem. Computational results show the effectiveness of the proposed method compared with the conventional column generation method.

Original languageEnglish
Pages (from-to)275-283
Number of pages9
JournalIEEJ Transactions on Electronics, Information and Systems
Issue number2
Publication statusPublished - 2010
Externally publishedYes


  • Column generation
  • Combinatorial optimization
  • Dual inequality
  • Railway crew scheduling
  • Set covering problem

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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