ORDER PICKING IN CAROUSEL SYSTEMS UNDER THE NEAREST ITEM HEURISTIC

The Travel Time in Carousel Systems under the Nearest Item Heuristic

A carousel is an autolnated warehousing systern consisting of a large nUlnber of drawers rotating in a closed loop. In this paper we study the travel time n"",ded to pick a list of items when the carousel operates under the Nearest Item heuristic. \Ve find a closed form expression for all moments and the distribution of the travel time. \Ve also analyz,e the asymptotic behavior of the travel ti...

Optimal picking of large orders in carousel systems

A carousel is an automated storage and retrieval system which consists of a circular disk with a large number of shelves and drawers along its circumference. The disk can rotate either direction past a picker who has a list of items that have to be collected from n different drawers. In this paper, we assume that locations of the n items are independent and have a continous non-uniform distribu...

Material Flow Enhancement in Production Assembly Lines under Application of Zoned Order Picking Systems

D. Živanić, G. Vujić, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia; B. Kosec, University of Ljubljana, Faculty of Natural Sciences and Engineering, Ljubljana, Slovenia; A. Stoić, University of Osijek, Mechanical Engineering Faculty, Slavonski Brod, Croatia Introduced research work relates to the possibility of material flow enhancement in production systems, with the ...

Order Picking Problems under Weight, Fragility and Category Constraints

Large-scale order batching in parallel-aisle picking systems

This paper discusses an order batching formulation and heuristic solution procedure suitable for a largescale order picking situation in parallel-aisle picking systems. Order batching can decrease the total travel distance of pickers not only through reducing the number of trips, but also by shortening the length of each trip. In practice, some order picking systems retrieve 500~2000 orders per...