T WAREHOUSE & DISTRIBUTION SCIENCE Release 0.1.2 http://www.warehouse-science.com John J. Bartholdi, III 1 Steven T. Hackman May 22, 1998; revised May 24, 2002 1 Copyright c 1998–2002 John J. Bartholdi, III and Steven T. Hackman. All rights reserved. This material may be freely copied for educational purposes, but not for resale, as long as the authors’s names and the copyright notice appear clearly on the copies. The authors may be con- tacted at
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[email protected]. edu. DRAF 2 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT Contents Preface i 0.1 Why this book . ........................... i 0.2 Organization ............................... i 0.3 Resources . ............................... ii 0.4 But first. ............................... ii 1 Introduction 1 2 Material flow 5 2.1 The warehouse as a queueing system . ................ 6 2.1.1 Extensions ........................... 8 2.2 Questions . ............................... 9 3 Warehouse operations 11 3.1 Receiving . ............................... 12 3.2 Put-away . ............................... 12 3.3 Process customer orders . ....................... 13 3.4 Order-picking . ........................... 13 3.4.1 Sharing the work of order-picking . ............ 14 3.5 Checking and packing . ....................... 16 3.6 Shipping . ............................... 16 3.7 Summary . ............................... 16 3.8 More . ............................... 17 3.9 Questions . ............................... 18 4 Storage and handling equipment 19 4.1 Storage equipment ........................... 19 4.1.1 Pallet storage . ....................... 20 4.1.2 Bin-shelving or static rack . ................ 23 4.1.3 Gravity flow rack . ....................... 23 4.1.4 Carousels . ........................... 26 4.2 Conveyors . ............................... 27 4.3 Sortation equipment ........................... 27 4.4 Summary . ............................... 27 3 DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT DRAFT 4 CONTENTS 4.5 On the lighter side ...........................