List of Articles 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 20.1001.1.22519904.2013.6.13.1.0 Open Access Article Abstract Page Full-Text 2 - A cost-oriented model for multi-manned assembly line balancing problem Abolfazl Kazemi Abdolhossein Sedighi 20.1001.1.22519904.2013.6.13.2.1 Open Access Article Abstract Page Full-Text 3 - Optimization of Plastic Injection Molding Process by Combination of Artificial Neural Network and Genetic Algorithm MOHAMMAD SALEH MEIABADI abbas Vafaei Fatemeh Sharifi 20.1001.1.22519904.2013.6.13.5.4 Open Access Article Abstract Page Full-Text 4 - A New Algorithm for the Discrete Shortest Path Problem in a Network Based on Ideal Fuzzy Sets Sadollah Ebrahimnejad Seyed Meysam Mousavi Behnam Vahdani 20.1001.1.22519904.2013.6.13.3.2 Open Access Article Abstract Page Full-Text 5 - The project portfolio selection and scheduling problem: mathematical model and algorithms Bahman Naderi 20.1001.1.22519904.2013.6.13.7.6 Open Access Article Abstract Page Full-Text 6 - A New Fuzzy Method for Assessing Six Sigma Measures Seyed Habib A Rahmati Abolfazl Kazemi Mohammad Saidi Mehrabad Alireza Alinezhad 20.1001.1.22519904.2013.6.13.4.3 Open Access Article Abstract Page Full-Text 7 - A Multi-level Capacitated Lot-sizing Problem with Safety Stock Deficit and Production Manners: A Revised Simulated Annealing Esameil Mehdizadeh Mohammad Reza Mohammadizadeh 20.1001.1.22519904.2013.6.13.6.5