An approximation algorithm for scheduling two parallel machines with capacity constraints

  • Authors:
  • Heng Yang;Yinyu Ye;Jiawei Zhang

  • Affiliations:
  • State Key Laboratory of Intelligent Technology and System, Department of Automation, Tsinghua University, Beijing 100084, People's Republic of China;Department of Management Science and Engineering, School of Engineering, Stanford University, Stanford, CA;Department of Management Science and Engineering, School of Engineering, Stanford University, Stanford, CA

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2003

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Abstract

We consider the problem of scheduling n independent jobs on two identical parallel machines, with a limit on the number of jobs that can be assigned to each single machine, so as to minimize the total weighted completion time of the jobs. We study a semidefinite programming-based approximation algorithm for solving this problem and prove that the algorithm has a worst case ratio at most 1.1626.