ISO 22400 inventory accuracy is a manufacturing KPI comparing recorded inventory with physical stock.
ISO 22400 inventory accuracy is a manufacturing operations KPI that describes how closely recorded inventory quantities match the physical quantities available at a defined location, material, lot, or time.
In the ISO 22400 context, inventory accuracy is used as part of performance measurement for manufacturing operations management. It is commonly applied across ERP, MES, WMS, and shop-floor material systems to assess whether inventory records are reliable for planning, kitting, production execution, and traceability. The comparison may be based on counts, units, batches, serial numbers, or storage locations, depending on how the inventory model is defined.
Implementations often express inventory accuracy as a percentage of records or quantities that match the physical count, sometimes within an allowed tolerance. The exact calculation can vary by site, material type, and system design.
Inventory accuracy should not be confused with inventory availability or inventory value. A record can be accurate while stock is still insufficient for a work order, and financial inventory totals can be acceptable while detailed lot, serial, or location records are incorrect.