 If daily delivery with one day stock is applied, delivery frequency will be 4,000 and average inventory level of A class item will be 1.5 days' supply and total inventory level will be 1.025 weeks' supply, a reduction of inventory by 59%.Total delivery frequency is also reduced to half from 16,000 to 8,200.By applying weighed control based on ABC classification, required man-hours and inventory level are drastically reduced.