An auditor is reviewing the inventory count procedures for a manufacturing client. The client's inventory includes raw materials, work-in-process (WIP), and finished goods, stored in multiple warehouses. The auditor's primary concern relates to the valuation assertion for WIP inventory. Which of the following procedures would be most effective in addressing this concern?
- ATracing a sample of raw material requisitions to the production records.
- BReviewing standard cost documentation and comparing it to actual production costs for WIP.
- CObserving the client's physical inventory count procedures and performing test counts of finished goods.
- DConfirming inventory held at third-party warehouses with the custodians.
Show answer & explanationAnswer & explanation
Correct answer: B. Reviewing standard cost documentation and comparing it to actual production costs for WIP.
The valuation of work-in-process (WIP) inventory is complex as it involves raw materials, direct labor, and manufacturing overhead. Reviewing standard cost documentation and comparing it to actual production costs directly addresses whether the costs assigned to WIP are accurate and appropriate, thus testing the valuation assertion.
Why the other options are wrong
- A. Tracing raw material requisitions to production records primarily addresses completeness or accuracy of material usage, not the overall valuation of WIP, which includes labor and overhead.
- C. Observing physical counts and test counting primarily address existence and completeness, not valuation, especially for WIP's cost components.
- D. Confirming inventory at third parties addresses existence and rights, not the valuation of WIP inventory which is typically stored internally.
Valuation of Work-in-Process (WIP) Inventory
Valuation of Work-in-Process (WIP) inventory involves determining the appropriate cost to assign to partially completed goods, including raw materials, direct labor, and allocated manufacturing overhead. This often relies on a client's cost accounting system and standard costing methods.
- WIP valuation is complex due to multiple cost components and stage of completion.
- Auditors typically review the client's cost accounting system, standard costs, and allocation methods.
- Procedures include comparing standard costs to actuals, testing overhead allocation, and reviewing for obsolescence.
Memory trick: WIP's VALUE comes from its COMPONENTS, so CHECK the COSTS.