per International Journal of Industrial Engineering & Production Management 2014-08 25 2 131 142 article amin_mahmoudi10@yahoo.com 1 shavandi@sharif.edu 2 http://ijiepm.iust.ac.ir/article-1-795-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 143 153 article mnojavan@azad.ac.ir 1 http://ijiepm.iust.ac.ir/article-1-780-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 155 165 article maserrat.nemat@gmail.com 1 mas_monfared@alzahra.ac.ir 2 taghavifard@ibi.ac.ir 3 http://ijiepm.iust.ac.ir/article-1-678-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 167 184 article Maghsoud Amiri mg_amiri@ie.sharif.edu 1 Ali Mohtashami 2 Allameh Tabatabaei This paper presents a methodology to optimize production rate and focuses on an optimal buffer storage sizing for this purpose. Buffer storages are intermediate semi complete components which their capacity is an important factor in design of production lines and impact on the production line. This methodology with eliminating of some simpler assumptions, assumes that the arrival rate of parts to production (or assembly) line, service times of the stations, time between failures of machines and repair time of failed machines are non deterministic and generally distributed (not just exponential). To optimize the buffer capacities, we consider production line as a queuing network and we use response surface methodology, simulation, genetic algorithm and multi objective decision making http://ijiepm.iust.ac.ir/article-1-522-en.pdf Buffer storage Queuing network Genetic algorithm Response surface methodology Simulation Multi objective decision making per International Journal of Industrial Engineering & Production Management 2014-08 25 2 185 204 article mkarbasi@mut-es.ac.ir 1 2 3 4 5 http://ijiepm.iust.ac.ir/article-1-669-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 205 216 article nasim_nahavandi@yahoo.com 1 2 http://ijiepm.iust.ac.ir/article-1-779-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 217 235 article )، m.amirkhan.ie@gmail.com 1 a.norang@gmail.com 2 tavakoli@ut.ac.ir 3 http://ijiepm.iust.ac.ir/article-1-765-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 237 247 article amohaghar@ut.ac.ir 1 md_hakkak@yahoo.com 2 hossein.yaghoubi@ymail.com 3 http://ijiepm.iust.ac.ir/article-1-745-en.pdf per International Journal of Industrial Engineering & Production Management 2014-08 25 2 249 262 article eskandari@modares.ac.ir 1 em.mahmoodi@gmail.com 2 http://ijiepm.iust.ac.ir/article-1-792-en.pdf