Operations Research Transactions

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Online hierarchical service scheduling on two identical machines with release times

HOU Liying1,*   

  1. 1. College of Science, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2015-05-08 Online:2016-06-15 Published:2016-06-15

Abstract:

This paper considers online scheduling problem on two identical machines under a grade of service, where jobs arrive online over time. The objective is to minimize the maximum completion time. We propose an online algorithm with competitive ratio \frac{7}{4}.

Key words: online scheduling, grade of service, release time, competitive ratio