The four broad categories of inventory are raw materials, work-in-process, MRO, and finished goods.

• A. True
• B. False
• C. Not Applicable
• D. Other

Answer: (A)

Understanding inventory categories involves seeing how items exist and move in production. The four broad groups capture both materials being transformed and the supplies that keep operations going. Raw materials are the basic inputs that will become part of finished products. Work-in-process consists of items that are currently being converted into finished goods. Finished goods are fully completed products awaiting sale. MRO, or maintenance, repair, and operating supplies, covers items used to run and maintain the production process—things like spare parts, lubricants, tools, and safety gear—needed for operations but not part of the final product itself. This combination covers the main types of stock a manufacturing or distribution operation holds, so the statement is true. If one wonders about other classifications, MRO is typically treated as indirect materials or supports inventory rather than direct materials, but it is still considered inventory in this framework.