A strange term, if you're unfamiliar with logistics operations, but this is the term used in the US and in other English-speaking countries.

Dave Piasecki
Of all warehouse processes, order picking tends to get the most attention. It’s just the nature of distribution and fulfillment that you generally have more outbound transactions than inbound transactions, and the labor associated with the outbound transactions is likely a big piece of the total warehouse labor budget. Another reason for the high level of importance placed on order picking operations is its direct connection to customer satisfaction. The ability to quickly and accurately process customer orders has become an essential part of doing business.
Dave Piasecki, CPIM is owner/operator of Inventory Operations Consulting LLC, a consulting firm providing services related to inventory management, material handling, and warehouse operations to manufacturers and distributors in Southeast Wisconsin and Northeast Illinois. He has over 15 years experience in warehousing and inventory management and can be reached through his website (http://www.inventoryops.com), where he maintains additional relevant information and links

http://www.inventoryops.com/order_picking.htm