what is mro classification
They change their form and become part of the finished product. Components and Parts-Just as raw materials are converted to finished goods in a manufacturing operation, components and parts are assembled into finished goods in an assembly operation. Maintenance, repair and operating. inventories (MRO) - These include parts, supplies, and materials used in or consumed by routine maintenance and repair of operating equipment, or in support of operations. In-process goods-These are goods in the process of manufacturing and only partially completed.