While using an inventory management system, it is still important to verify accuracy every once in a while. We suggest doing the occasional soft count (maybe once a week) to get a good estimate of inventory numbers. This helps ensure that product quantities are in a the correct range.
We also recommend doing a hard count monthly or every other month (depending on size of warehouse). A hard count is physically counting each inventory item in the warehouse. This may take some time but it is well worth the warehouse manager/team's time to ensure accuracy.