Abstract

In §3 of (Lawler, E. L., J. K. Lenstra, A. H. G. Rinnooy Kan. 1981. Minimizing maximum lateness in a two-machine open shop. Math. Oper. Res. 6 153–158.) we have given an erroneous proof of the fact that the problem of minimizing maximum lateness in a two-machine open shop when no preemptions are allowed is NP-hard.

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