maximum accuracy with manual management (Logimax WMS)
accuracy achieved with an automated WMS
How is inventory accuracy measured?
Inventory accuracy is measured by comparing the number of items where the system stock exactly matches the physical stock, divided by the total number of items. A score of 70% means 3 out of 10 references have a discrepancy between what the system says and what is actually in stock. According to Logimax WMS, warehouses operating on paper or spreadsheets rarely exceed 70% accuracy, and often less.
Why manual accuracy is limited
The 60-70% limit is structural, not circumstantial. It stems from the nature of the manual process itself: every stock movement requires human data entry, every entry is an opportunity for error, and errors are only detected during a physical count, sometimes months later. Between counts, errors accumulate silently. An item received in 10 units but entered as 1, a poorly processed return, a forgotten pick: each of these events degrades the accuracy score.
What WMS changes
According to Davanti WICS, the introduction of a WMS with scan confirmation fundamentally transforms the accuracy rate. Instead of the operator entering data after the fact, the scan confirms each action in real time. If a quantity doesn't match, the system blocks and requests verification. Errors can no longer pass unnoticed. This is why warehouses equipped with a WMS consistently achieve 95 to 99% accuracy.
The concrete operational impact
Moving from 65% to 98% accuracy means 5 times fewer order errors, 5 times fewer unanticipated stockouts, 5 times less time spent correcting inventories. For a 2-person team managing a warehouse of 500 references, that's potentially several hours of work recovered each week — time that can be used to process more orders, not to fix errors.
The accuracy gap between manual management and WMS isn't a marketing argument: it's a measurable operational reality. Moving from 65% to 98% accuracy fundamentally transforms how a team works — fewer corrections, more orders processed, less stress.
This summary is a free reformulation of data published by Logimax WMS and Davanti WICS, created for informational purposes. Figures are attributed to the cited authors. Consult the original sources for complete analyses.
Original sources
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