Role of WMS:WMS are providing real time views on material flows within the warehouse, i.e. tracking and keeping note of the movement and storage of material within a warehouse facilitating the optimal use of space, labor, and equipments. From the managers’ point-of-view, this means that a ________ enables to optimize transactions to and from warehouse operators, recognize problem areas and major shifts in activity levels and patters, while making it possible continuously determine performance indicators, such as productivity, shipping and inventory accuracy, warehouse order cycle time, and storage density.