weighted average cost method process costing
Weighted Average Method Overview. The weighted average method is used to assign the average cost of production to a product. Weighted average costing is commonly used in situations where: 1  Inventory items are so intermingled that it is impossible to assign a specific cost to an individual unit.eighted Average Method Overview. The weighted average method is used to assign the average cost of production to a product. Weighted average costing is commonly used in situations where: 1  Inventory items are so intermingled that it is impossible to assign a specific cost to an individual unit.