id	keyword
fbem-10517	order
fbem-10517	picking
fbem-10517	time
fbem-10517	sorting
fbem-10517	algorithm
fbem-10517	optimization
fbem-10517	batch
fbem-10517	problem
fbem-10517	research
fbem-10517	batching
fbem-10517	journal
fbem-10517	model
fbem-10517	et al
fbem-10517	online
fbem-10517	system