The company was focusing on production which was partial mission rather than acquiring the information of customer in intensive process industry. The company accepted loss which is from over-production, losing of opportunity. After changing to Web environment, supply chain is more complicated and need of customer is more various. As a result the company hard works on controlling production rates, production quantities in production area and gathering exact information which is about available resource and available quantities. Cooperated demand planning have to get decreasing of inventory, improving of customer service in supply chain management. Specially demand planning that considers allocation of capacity is executed in Iron-Industry. Demand planning must be classified by customer, region and supply position level.

In this study, it is conducted analysis of water absorption of artificial lightweight aggregate using coal ash. For absorption of water, the artificial lightweight aggregate was submerged for 24hours or in conditions of high temperature(100℃) and normal pressure. And it was measured water absorption ration and density( in conditions of oven-dry and saturated surface dry).