A method of tracking inventory that records sales and purchases in real time, maintaining continuously updated inventory counts without requiring periodic physical counts to determine stock levels. This system automatically adjusts inventory records immediately when items are received, picked, shipped, or moved, providing warehouse managers with instant visibility into current stock levels.

This real-time tracking capability is crucial for maintaining accurate inventory data, preventing stockouts, and enabling better demand planning. Unlike periodic inventory systems that rely on scheduled physical counts, perpetual inventory reduces the risk of discrepancies between recorded and actual stock levels, minimizing costly errors and improving customer satisfaction.

For example, when a warehouse worker scans a barcode during order fulfillment, the system instantly deducts that quantity from available inventory, allowing purchasing teams to reorder products before stock runs out. Modern WMS platforms integrate seamlessly with perpetual inventory systems, supporting automated cycle counting and exception reporting to maintain data accuracy.

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