What are the cost accounting systems that are used by a contractor manufacturing a number of identical units for multiple customers?

A contractor manufacturing identical units for multiple customers typically uses job order costing or process costing systems. Job order costing tracks costs for each specific order or batch, allowing for detailed tracking of expenses for individual customer requests. In contrast, process costing is used when products are mass-produced in continuous processes, averaging costs over all units produced. The choice between these systems depends on the production process and the need for cost accuracy for specific orders.