Manufacturing
Weak BOM, Weak Product Costing. Fix This First
Manufacturing teams often trust product costing that has never been properly stress-tested against real material usage and process loss.
In this guide
On this page
Many manufacturing businesses say they know product cost. A closer look often shows they know a version of product cost.
The biggest reason is a weak or outdated BOM.
What goes wrong in practice
- standard consumption is old
- process loss is assumed, not measured
- packaging layers are partially ignored
- labour additions happen outside standard costing
- batch yield variation is not fed back into revision
- by-products and scrap are poorly tracked
Why BOM quality matters
A BOM is not just a production tool. It drives:
- pricing
- purchase planning
- material requirement
- variance analysis
- margin confidence
If the BOM is wrong, many downstream decisions are wrong with it.
What a good BOM review should include
| Area | What to validate |
|---|---|
| material consumption | actual vs standard |
| process loss | realistic percentage by stage |
| yield | batch-wise output consistency |
| packaging | primary, secondary, transit |
| labour assumptions | manual effort and machine time |
| by-product or scrap | recovery and accounting treatment |
The founder risk
You may accept large orders thinking margin is safe, when actual loss and packing cost make the order much weaker.
A simple discipline
Review top-selling SKUs or top contribution SKUs first. Do not try to clean all BOMs at once.
Use production history, not only theory.
What to do next
Choose 10 important SKUs and compare:
- standard BOM
- actual recent batch consumption
- actual packing material usage
- observed process loss
That one exercise often reveals more pricing risk than a full-year P&L review.
This information is for educational purposes only and does not constitute professional advice.
In manufacturing businesses, this usually gets solved faster when costing logic, stock flow, and reporting are tightened together through Tally Customisation, Process Automation, and Fractional CFO Services.
This material is general information. Apply it to your business only after checking the relevant facts, source documents and requirements.