Product Costing Accuracy Self-Assessment
Product cost is only as good as the BOMs, routings, rates and updates behind it. This ten-question check gives you a score and a short list of where to look first.
1. How often are standard costs rolled up and reviewed?
2. How accurate are your bills of material?
Think of cycle count and job close findings.
3. How are routing times set?
4. How are labor and machine rates calculated?
5. How is overhead absorbed into products?
6. How do you handle variances at job close?
7. How current are purchased item costs?
8. How reliable are shop floor reporting and scrap data?
9. Do you compare quoted cost with actual cost?
10. Can you explain inventory valuation changes between periods?
How to use the assessment
Answer each question for your plant as it is today, not as the procedure says it should be. Ask the cost accountant and a production supervisor to answer separately, since their answers often differ. The score is a percentage of the maximum, and the result band suggests what to work on first. Export the result to share with your team.
- Answer on actual practice
- Compare answers from finance and operations
- Re-run after each improvement cycle
What the questions test
The questions follow the cost build-up: material through the BOM, labor and machine time through routings, rates and overhead absorption, then the feedback loop of variance review, shop floor data and quoted versus actual comparison. A weak link at any step carries through to every product that depends on it, and to every quote priced from it.
Reading your result
Low scores usually point to one or two root causes, most often outdated routing times or unmanaged BOM changes. Mid scores mean controls exist but are applied unevenly. High scores shift the focus from correctness to speed and feedback: automating reports and linking quotes to actuals. Treat the band as a prompt for an audit, not a verdict.
Common mistakes
Teams often fix rates before fixing times, then spend months debating variances caused by bad routings. Others update standards after every price move, which makes variance analysis useless. Update on a schedule, document why, and keep a history so period comparisons stay meaningful.
Frequently Asked Questions
How often should standard costs be updated?
Many manufacturers do a full roll once a year and a review each quarter. The right cadence depends on price volatility and product change. Avoid constant changes, because they make variances hard to interpret.
What is a good sign of costing accuracy?
Small and explainable variances at job close, routing times close to reported actuals, and quoted cost close to actual cost across a range of jobs. Persistent one-sided variances suggest the standard is wrong.
Should finance or operations own routing times?
Operations or industrial engineering should own the times, since they know the process, while finance reviews the effect on cost. Shared review stops each side from blaming the other when variances appear.
Does this replace a formal costing audit?
No. It is a quick self-check to find where to look. A formal audit tests BOMs, routings, rates and postings with sample data and reconciliations to the ledger.
If you want a view of variances and cost accuracy that updates from your ERP without manual spreadsheets, Netray can discuss a read-only reporting setup.
Related Tools
Manufacturing RFQ and Quote Readiness Checklist
A pre-submission checklist that estimators use to confirm scope, costs, risks and terms are covered before a quote leaves the building.
Costing & FinanceManufacturing Cost Accounting Formulas Reference
A searchable lookup of the cost accounting formulas used in manufacturing: cost flows, overhead absorption, variances, break-even and pricing maths.
Costing & FinanceBasis of Estimate Document Template
Fill in the fields to produce a structured basis of estimate document that explains how a price was built.
SAPSAP Controlling (CO) Database Tables Reference
A searchable reference of the SAP tables behind cost centers, internal orders, product costing and material valuation.
More Costing & Finance tools
See all- Manufacturing KPI Formula and Definitions Reference
- Manufacturing Cost Variance Types Reference
- Price, Volume and Cost Margin Variance Calculator
- Month End Reporting Readiness Checklist for Manufacturers
- OEE Improvement Value Calculator
- Improve OEE vs Buy a New Machine Calculator
- Six Sigma Project Savings Tracker Worksheet
- Should Cost Model Worksheet for Machined Parts
- Quote Assumptions and Exclusions Template