Every business holds inventory for different reasons. A manufacturer may store raw materials ready for production, while a retailer may only hold finished goods ready for sale. Understanding the different types of inventory is essential for managing stock effectively, reducing costs and ensuring products are available when customers need them.
Although the exact inventory held will vary between industries, most organisations manage one or more of the following inventory types.
Raw materials are the basic components used to manufacture a finished product. They are purchased from suppliers and stored until they are required for production.
Examples include:
Managing raw materials effectively helps manufacturers avoid production delays while preventing excessive stock from tying up valuable working capital.
Typical challenges
Work in Progress (WIP), sometimes referred to as Work in Process, represents products that have entered production but have not yet been completed.
For example, a table that has been cut and assembled but is still waiting to be painted would be classed as Work in Progress inventory.
Accurately tracking WIP helps businesses understand production efficiency, identify bottlenecks and calculate manufacturing costs more accurately.
Examples
Finished goods are completed products that are ready to be sold or distributed to customers.
This is the inventory most businesses monitor most closely, as it directly impacts sales and customer satisfaction.
Examples include:
Maintaining the right level of finished goods ensures customer orders can be fulfilled quickly without overstocking products that may become obsolete.
Consumables are items used during the day-to-day running of a business but are not sold directly to customers.
Although often inexpensive individually, consumables can represent a significant ongoing cost if not managed properly.
Examples include:
Monitoring consumable inventory helps prevent unexpected shortages that could disrupt business operations.
MRO inventory consists of the equipment, tools and supplies required to maintain business operations rather than manufacture products.
Although these items are not incorporated into finished goods, they are essential for keeping machinery and facilities operating efficiently.
Typical examples include:
Poor management of MRO inventory can lead to costly equipment downtime and unnecessary emergency purchases.
Spare parts are replacement components kept in stock to repair machinery, vehicles or equipment when failures occur.
Businesses operating manufacturing equipment, vehicle fleets or industrial machinery often rely on spare parts inventory to minimise downtime and maintain productivity.
Examples include:
Keeping critical spare parts readily available reduces repair times and helps maintain business continuity.
Each type of inventory serves a different purpose and requires its own management strategy. While raw materials support production and finished goods generate revenue, consumables, MRO inventory and spare parts ensure the business can continue operating efficiently.
Modern inventory management systems enable organisations to categorise inventory, monitor stock levels in real time and apply different control methods to each inventory type. This provides greater visibility across the entire supply chain and helps businesses make smarter purchasing, production and stocking decisions.
How Birdy Helps
Birdy enables businesses to manage every type of inventory from a single platform. Whether you’re tracking raw materials, finished goods, consumables or spare parts, Birdy provides real-time stock visibility, barcode scanning, batch and serial number tracking, multi-location inventory management and intelligent reporting to help keep your operations running smoothly.