TY - JOUR T1 - Hierarchical Minimization of Total Completion Time and Number of Tardy Jobs Criteria AU - , E.O. Oyetunji AU - , A.E. Oluleye JO - Asian Journal of Information Technology VL - 7 IS - 4 SP - 157 EP - 161 PY - 2008 DA - 2001/08/19 SN - 1682-3915 DO - ajit.2008.157.161 UR - https://makhillpublications.co/view-article.php?doi=ajit.2008.157.161 KW - Hierarchical minimization KW -heuristics KW -relative weight KW -composite objective function KW -single machine AB - In this study, the single machine bicriteria scheduling problem of hierarchically minimizing the total completion time of jobs (Ctot) and number of tardy jobs (NT) with release time was explored. Two types of hierarchical minimization models (the case of the total completion time criterion being more important than the number of tardy jobs criterion and the case of the number of tardy jobs criterion being more important than the total completion time criterion) were discussed. Three heuristics (HR4, HR5 and HR6) selected from the literature were used to test the models. ER -