Table 1.

The components of the model.

Components
Entity	Raw oil
Resources	Bascule, Inspectors, PX 60, SRG, SSG, Dryer, Discoloring storage, Operators of odorlessing section, Operators of partitioning section, Operators of hydrogenation section, Operators of filtering section, Operators of post bleach section, and Serak machine
Queues	Bascule queue, Laboratory 1 queue, PX60 separator queue, SRG separator queue, SSG queue, Dryer queue, Discolor queue, Odorless queue, Partitioning queue, Hydrogenation queue, Serak machine queue, and Post bleach queue
Group Resources	Inspectors, Operators of odorless section, Operators of partitioning section, Operators of hydrogenation, Operators of filtering section, and Operators of post bleach section
Transporters	Oil tanker and Liftruck
Conveyers	Conveyer
Processes	Weighting, Laboratory test, PX60 separator, First washing, Second washing, Drying, Discoloring storages, Odorless, Packaging storages, Serak machine, Packaging, Hydrogenation, Filtering, Post bleach, Cold Storage, and Vacating
Scheduling	Regarding to production line that works in three parts of 8 h of a day, scheduling should be done in every section that operators work. Operators who were scheduled are the current operators in group resources
Inputs	Entrance of raw oil
Outputs	Returning oil, Fatty acid storages, Soup storages, First of neutral line, Solid oil storages, and liquid oil storages
Variables	Total oil in process and maximum of oil entrance