On the complexity of constructing multiprocessor little-preemptive schedules
Trudy Matematicheskogo Instituta imeni V.A. Steklova, Modern problems of mathematics, mechanics, and mathematical physics, Tome 290 (2015), pp. 178-190

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We present a full and correct proof of the fact that the problem of constructing an optimal schedule for the open shop problem with at most $m-3$ preemptions for an $m$‑processor system is NP-hard. We also show that the proof of this result given by E. Shchepin and N. Vakhania in Ann. Oper. Res. 159, 183–213 (2008) is incorrect.
@article{TM_2015_290_a14,
     author = {E. V. Shchepin},
     title = {On the complexity of constructing multiprocessor little-preemptive schedules},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {178--190},
     publisher = {mathdoc},
     volume = {290},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2015_290_a14/}
}
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E. V. Shchepin. On the complexity of constructing multiprocessor little-preemptive schedules. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Modern problems of mathematics, mechanics, and mathematical physics, Tome 290 (2015), pp. 178-190. http://geodesic.mathdoc.fr/item/TM_2015_290_a14/