id	keyword
cana-728	production
cana-728	planning
cana-728	costs
cana-728	model
cana-728	research
cana-728	production planning
cana-728	programming
cana-728	demand
cana-728	stochastic
cana-728	uncertainty
cana-728	journal
cana-728	analysis
cana-728	company
cana-728	time
cana-728	production costs