List of Articles Preemption Open Access Article Abstract Page Full-Text 1 - Scheduling of a flexible flow shop with multiprocessor task by a hybrid approach based on genetic and imperialist competitive algorithms Javad Rezaeian Hany Seidgar Morteza Kiani Open Access Article Abstract Page Full-Text 2 - Modeling and Solution Procedure for a Preemptive Multi-Objective Multi-Mode Project Scheduling Model in Resource Investment Problems Mostafa Salimi Amir Abbas Najafi 10.22094/joie.2017.592.1381 Open Access Article Abstract Page Full-Text 3 - The Preemptive Just-in-time Scheduling Problem in a Flow Shop Scheduling System Javad Rezaeian Sadegh Hosseini-Kia Iraj Mahdavi 10.22094/joie.2017.499.11 Open Access Article Abstract Page Full-Text 4 - A Bi-objective Pre-emption Multi-mode Resource Constrained Project Scheduling Problem with due Dates in the Activities zahra Sadat Hosseini Javad Hassan pour Emad Roghanian