Manufacturing closes stress inventory assertions harder than pure trading businesses. Financial auditing guidance for year-end audit preparation in this sector should spotlight three recurring themes.
WIP that never ages
Work-in-process balances that stay flat for months attract sampling. If your routings are outdated, count observations will not match theoretical stages. Update the stage map before inviting observers.
Consignment ambiguity
Stock at customer sites needs contracts, ship notices, and usage reports in one folder. “We trust the salesperson’s spreadsheet” is a finding waiting for a polite tone.
Spare parts vs. inventory
Capitalization policies look clean until maintenance pulls high-value parts mid-count. Document the threshold and show exceptions, not just the policy PDF.
What to do before fieldwork
- Reconcile perpetual to GL with a clear bridge for scrap and rework.
- Tag slow-moving SKUs with last movement dates, not only ABC class.
- Brief plant leads on which lines are in the sample universe.
Our inventory module inside Year-End Audit Mastery uses plant-floor scenarios drawn from Korea manufacturing cohorts.