Sequencing single machine multiple-class customer order jobs using heuristics and improved simulated annealing algorithmsWin-Chin Lin, Xingong Zhang, Xinbo Liu, Kai-Xiang Hu, Shuenn-Ren Cheng, Ameni Azzouz and Chin-Chia WuRAIRO-Oper. Res., 57 3 (2023) 1417-1441DOI: https://doi.org/10.1051/ro/2023056