There is a lack of control over the materials in the production department, and they are distributed as much as the essentials on the production line. Some materials are taken by some people; Some departments do not pay attention to the recycling of corner waste and let it run away. In addition, the grass-roots management personnel did not consider the company's production and operation plan and current inventory, resulting in excessive or shortage of materials, which directly led to the increase of inventory turnover cost or production interruption, resulting in work delay. The lack of management mechanism affects the restriction and control of material consumption, increases the waste of materials, and thus increases the production cost.