原材料库存管理。管理库存但尚未使用的所有零部件的总成本。管理直接材料（即纳入最终产品的材料）和间接材料（即未纳入最终产品但在生产过程中消耗的材料）的成本。 Administering the inventory of raw materials. Manage the total cost of all component parts in stock but not yet used. Manage the cost of the direct materials (i.e., materials incorporated into the final product) and indirect materials (i.e., materials not incorporated into the final product but consumed during the production process).