Order picking is the process of obtaining the items indicated in an order from the appropriate warehouses. It is the initial step in completing a customer’s order, thus it is crucial that it go off without a hitch in order for the subsequent stages to be successful—order packing, shipping, and post-sale activities. It is the initial step in completing a customer’s order, thus it is crucial that it go off without a hitch in order for the subsequent stages to be successful—order packing, shipping, and post-sale activities.