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A Note on Open Shop Preemptive Schedules

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1 Author(s)
Gonzalez, T. ; Department of Computer Science, Institute of Technology

The problem of preemptively scheduling a set of n independent jobs on an m processor open shop is discussed. An algorithm to construct preemptive schedules with minimum-maximum finishing time is presented. The worst case time complexity is 0(r + min {m4, n4, r2}), where r is the number of nonzero tasks. The maximum number of preemptions introduced is 0(min {rn, rm, n3, m3}). The algorithm is best possible for open shops with a fixed number of processors or jobs. In this case the maximum number of preemptions introduced is bounded by some fixed constant.

Published in:

Computers, IEEE Transactions on  (Volume:C-28 ,  Issue: 10 )

Date of Publication:

Oct. 1979

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