Costing
How batch yield affects manufacturing cost
A formula cost is an estimate of what the batch should consume and what it should make. Actual cost is what the plant issued and what the batch actually made. Yield is the bridge. When yield comes in short, the cost of the ingredients does not shrink with it. The same spend sits on fewer finished units.
That is a different problem from an ingredient price that moved. Quoting from a current formula cost covers a stale price. This page covers a finished quantity that did not match the formula, and what that does to the unit cost.
A worked example, not a customer result
The formula expects 100 kilograms of finished product. The ingredients issued cost $1,000. The estimate is $10 per finished kilogram, before labor. The batch yields 92 kilograms of product that can be packed. The ingredient price did not change. The finished quantity did.
$1,000 spread over 92 kilograms is about $10.87 per finished kilogram, not $10. The quote that used the formula quantity is light by that difference on every unit, before anyone looks at labor, a rework step, or a second issue of material. If the plant quotes the next order from the theoretical 100, it repeats the miss.
| Formula estimate | This batch | |
|---|---|---|
| Finished quantity | 100 kg | 92 kg |
| Ingredient cost issued | $1,000 | $1,000 |
| Cost per finished kilogram | $10.00 | about $10.87 |
The arithmetic is the point. A percentage on a scoreboard does not say which batch ran short, or whether the next quote should use 92 instead of 100. Yield loss and rework is what the floor does with the miss. Costing is what the next price does with it.
What has to stay on the open batch
- The formula quantity the quote used.
- The ingredients actually issued, and their cost.
- The finished quantity that can be packed, separate from scrap, sample, and rework.
- The unit cost that results, while the batch is still open.
If yield is typed into a workbook after the batch closes, the shipment may already be priced at the formula. Food manufacturing ERP, nutraceutical manufacturing ERP, cosmetics manufacturing software, and pharmaceutical manufacturing software keep the formula, the issue, the yield, and the batch cost on the open batch.
This does not replace your quality system, a validation, or an FDA approval.
This does not replace your food-safety program, your specifications, or a required approval.
This does not replace your safety assessment, your specifications, or a required approval.
Questions people ask before they switch
Why does actual batch cost differ from the formula estimate?
The formula estimate assumes a finished quantity. If the batch yields less, the ingredients already issued are spread over fewer units. The unit cost is higher even when the ingredient price is unchanged.
When should yield be compared with the formula?
While the batch is open, not only after it is closed. A short yield found during the run can still change a hold, a rework decision, or the next quote. A yield found at month end explains a cost the plant already shipped.
Does a better ingredient price fix a short yield?
No. Price and yield are different lines. A cheaper ingredient can still produce an expensive finished unit if less of the batch is usable.