Which inventory accounting method can cause discrepancies between book inventory and physical counts due to using expected rather than actual consumption?

• A. Available inventory
• B. Backorder
• C. Backflush
• D. Assemble-2-order

Answer: (C)

Backflushing is an inventory accounting approach where materials aren’t issued to production as they’re consumed. Instead, after production is completed, the system estimates material usage from the bill of materials and the actual production output, posting the consumption retrospectively. Because this relies on expected or standard consumption rather than tracking every actual material withdrawal, any real differences—such as scrap, waste, rework, or parts used for other purposes—create a gap between what the books say is on hand and what is physically in the warehouse. The discrepancy arises precisely because the accounting is based on expected consumption, not on exact, real-time usage. In environments with yield or process variability, backflushing can therefore lead to book-versus-physical-count differences, even though it reduces transaction detail.