When is specific identification actually required vs optional for inventory?

Question

AcadiFi · Accepted Answer

Specific identification is required when inventory items are not ordinarily interchangeable, or when goods are produced and segregated for specific projects. It's the gold standard for high-value, uniquely identifiable items.

Required triggers:
- Uniquely identifiable items (VINs, diamond serial numbers, custom-machined parts)
- Goods segregated for specific customer projects (aerospace castings for Boeing 787 Serial #2451)
- Real estate inventory held for sale

Optional/prohibited triggers:
- Fungible commodities (gold bullion, wheat grain) — use FIFO/WAC
- High-volume low-value retail — impractical, use FIFO/WAC
- Homogeneous manufactured goods — FIFO/WAC provides nearly identical results

For Meridian: each diamond ($4,500-$85,000 each) must use specific-ID — IAS 2 and ASC 330 both require it. But their bulk gold findings (clasps, jump rings purchased by weight) are fungible, so WAC is appropriate even though both sit in the same vault.

Analyst flag: firms can manipulate earnings under specific-ID by selectively shipping high-cost vs low-cost units. If gross margin swings dramatically without price movement, investigate inventory selection patterns. Compare gross margin volatility against FIFO peers — excessive smoothness may signal strategic unit selection. The method is technically defensible but creates more management discretion than formula-based methods like FIFO.

When is specific identification actually required vs optional for inventory?

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