A simulation study was carried out using the Arenas software (Kelton etal.,2010). During simulation runs , data were collected under system steady-state . The length of each simulation run is 30,000 timeunits , inwhichthefirst9600timeunitsare considered asthewarm-upperiod.Theaveragevaluesof90 replications are presented as results. The statistical analysis was performed using the paired Student t-test witha95% confidence level.
2.1. Simulation model