<P> We can identify the following main types of order picking: </P> <Ul> <Li> piece picking or picker to part method: the order picker (s) move (s) to collect the products necessary for one order . This is commonly seen in distribution centres for retail chains whereby a shop will require a great many replenishment goods . A picker may pick all or part of the replenishment for one shop . </Li> <Li> zone picking method: each order picker is assigned to one specific zone and will only realize order picking within this zone . For instance, in an electrical retail environment, both small and large items may be required and a picker on an electric vehicle such as a powered pallet truck (PPT) or an order picker vehicle may pick large and heavy items whereas a foot picker may pick small and light ones from another part of the warehouse . Eventually the two picks are collated . </Li> <Li> wave picking method: (Wave picking) the order picker (s) move (s) to collect the products necessary for several orders </Li> <Li> sorting systems method: no movement of the order picker (s), the products are brought to him by an automatic system (conveyor system, automatic storage ...). </Li> <Li> pick to box method: The WMS direct the operator to pick the sku from a storage bin or a transportation box and to put it inside the shipping box or into a box assigned to the sales order . </Li> </Ul> <Li> piece picking or picker to part method: the order picker (s) move (s) to collect the products necessary for one order . This is commonly seen in distribution centres for retail chains whereby a shop will require a great many replenishment goods . A picker may pick all or part of the replenishment for one shop . </Li> <Li> zone picking method: each order picker is assigned to one specific zone and will only realize order picking within this zone . For instance, in an electrical retail environment, both small and large items may be required and a picker on an electric vehicle such as a powered pallet truck (PPT) or an order picker vehicle may pick large and heavy items whereas a foot picker may pick small and light ones from another part of the warehouse . Eventually the two picks are collated . </Li>

Customer requirements as specified by a picking document