1. Stock leaves without being recorded
Items may be delivered to customers or internal departments before the issue transaction is recorded.
The system then shows more stock than is physically available.
2. Goods are received before being entered
Physical stock may arrive at the warehouse before the receipt is recorded in the system.
Actual inventory is then higher than the recorded balance.
3. Incorrect units of measure
Buying in cartons and selling in individual units is a common example. Incorrect conversion factors can create increasingly large discrepancies.
4. Warehouse transfers
Moving stock between warehouses should be recorded as a formal transfer.
Unrecorded transfers can make one warehouse appear overstocked and another appear short.
5. Returns and damaged items
Customer returns, supplier returns, damaged goods and free samples all affect stock.
When these movements happen outside the system, inventory records gradually become inaccurate.
6. Quantity entry mistakes
Entering 100 instead of 10 or selecting a similar item can create large differences.
Review procedures and permissions can help reduce these mistakes.
7. Infrequent stock counts
Physical counts are not only for correcting quantities. They also help identify patterns and the causes of discrepancies.
Regular counts allow problems to be identified before they become significant.
How to reduce inventory discrepancies
- ✓ Record receipts and issues immediately.
- ✓ Define clear user responsibilities and permissions.
- ✓ Use consistent units and conversion factors.
- ✓ Record warehouse transfers.
- ✓ Record damaged goods and returns.
- ✓ Perform regular physical stock counts.
- ✓ Review unusual inventory movements.
Conclusion
Accurate inventory depends on both the system and the procedures used around it.
A good inventory system helps track every movement, while disciplined transaction entry keeps recorded quantities close to reality.