Final answer:
Operation costing is a combination of job-order and process costing, used commonly in manufacturing where both custom and continuous processes are present.
Step-by-step explanation:
Operation costing is a hybrid of job-order and process costing. It combines elements of both costing systems to provide a more accurate means of allocating costs in environments where both job-specific and continuous process operations exist. This type of costing system is often utilized in manufacturing settings where parts are produced in a continuous process, and then those parts are used to create custom products.