“…Scheduling problems with due windows have been introduced by Anger, Lee and Martin-Vega [8]. The recent list of publications concerning scheduling problems with fixed or assignable due windows includes the papers of the following authors: Cheng [9], Lee [10], Kramer and Lee [11], Weng and Ventura [12][13][14], Liman and Ramaswamy [15], Mosheiov and Lann [16,17], Koulamas [18], Azizoglu and Webster [19], Wu and Wang [20], Linn, Yen and Zhang [21], Yeung, Oguz and Cheng [22], Yoo and Martin-Vega [23], Chen and Lee [24], Biskup and Feldmann [25], and Wodecki [26]. The due window assignment in scheduling problems with a general sum-type criterion (the most interesting for us) have been considered in the following papers by: Janiak and Marek [27,28], Kramer and Lee [29], and Liman, Panwalker and Thongmee [30,31].…”