The warehouse advantage features with radio frequency (RF) devices,
bar-code tags. Warehouse management systems (WMS) are used to manage the
movement and storage of materials in a warehouse. There are three types of products:
Tier 3, Tier 2, and Tier 1. Tier 3 WMS are the least expensive type. They allow
warehouse personnel to manage the flow of materials on conveyors and can be
integrated into picking systems. Tier 2 WMS applications are more robust than Tier 1
systems, but do not contain all of the features of a Tier 3 WMS. Typically, WMS are
used in large-scale or high-volume warehousing environments. Storage location
management, automatic order selection, inventory control & replenishment, and
shipping & receiving are common features.