Stock Accuracy
Stock accuracy is the degree to which recorded inventory quantities and locations match the physical spare parts actually available.
What this term means in maintenance
Stock accuracy is the degree to which recorded inventory quantities and locations match the physical spare parts actually available.
How stock accuracy is measured
A simple measure is:
Stock accuracy = Correctly matched inventory records ÷ Records counted × 100
Practical example
During cycle counting, 95 of 100 selected items match the recorded quantity and location.
Stock accuracy = 95%
Why accuracy matters
Planners and technicians rely on the system to confirm part availability before scheduling work.
Common causes of inaccuracy
- Unrecorded issues
- Unrecorded returns
- Wrong unit
- Duplicate item
- Incorrect location
- Receiving error
- Unauthorized adjustment
- Damaged or lost stock
Common mistake
Correcting the quantity without investigating the transaction or process failure allows the discrepancy to recur.
How this term differs
Stock Accuracy is the match between system records and physical inventory. It is related to Inventory Fill Rate, Stockout Rate, and Spare Parts Service Level, but these terms describe different records, measures, roles, strategies, or decisions and should not be used interchangeably.
Related concepts
Related maintenance terms
Keep exploring connected CMMS, reliability, and maintenance planning terms.
Inventory Cycle Counting
Inventory cycle counting is the regular verification of selected stock items so inventory accuracy can be maintained without waiting for a full annual count.
Stockout
A stockout occurs when a required spare part or maintenance material is unavailable when it is needed.
Spare Parts Inventory
Spare parts inventory is the controlled stock of replacement components and consumables kept available to support equipment maintenance and reduce avoidable downtime.
Glossary FAQs
- What is stock accuracy?
The degree to which system quantities and locations match physical inventory.
- How is it measured?
Correctly matched records divided by records counted, multiplied by 100.
- What causes poor accuracy?
Unrecorded issues, returns, receiving errors, wrong units, duplicates, and unauthorized adjustments.