Tez No	İndirme	Tez Künye	Durumu
403419		GridPick: A high density puzzle based order picking system with decentralized control / Yazar:ONUR ULUDAĞ Danışman: Prof. KEVIN R. GUE Yer Bilgisi: Auburn University / Yurtdışı Enstitü Konu:Bilgisayar Mühendisliği Bilimleri-Bilgisayar ve Kontrol = Computer Engineering and Computer Science and Control ; Endüstri ve Endüstri Mühendisliği = Industrial and Industrial Engineering Dizin:	Onaylandı Doktora İngilizce 2014 304 s.
We develop a novel semi-automated order picking system called GridPick that enables high levels of throughput, space usage, and exibility. The system uses unit sized conveyor modules in a grid architecture to bring requested items to and away from the pick face dynamically and as needed to fulll orders to the system. GridPick uses a message passing and negotiation algorithm with decentralized control rules, which is a relatively unexplored area in conveyor based material handling systems. In a second part of the dissertation, we modify the GridPick system to allow picking from two sides of the grid. This enhancement allows higher throughput and an improved use of space when compared with single sided, traditional systems. To investigate structural properties of the system, we present a Petri Nets model. We use the model to verify deadlock conditions for the single-sided version of GridPick. We show that the system is deadlock free for up to a 44 grid and conjecture that the general case is also true.