Abnormal production waste: spotting it and fixing it
How to recognise production waste that is outside the norm, record it correctly and trace the cause without distorting food cost and stock.
Every preparation has expected waste: peel, trimmed fat, cooking loss. The problem starts when waste exceeds the norm with no explanation: if you do not record it, the gap quietly lands on food cost and stock. This guide explains how to tell normal waste from abnormal waste and what to do about it.
Expected waste versus abnormal waste
Expected waste is the one built into the production recipe yield: if 10 kg of raw material should give 8 kg of finished product, 20% is normal. Abnormal waste is whatever exceeds that threshold in a single run.
- Quantity used versus finished product obtained
- Expected yield stated in the production recipe
- Difference in quantity and in value
- Declared reason for the waste
Record waste at the right moment
Declare the production with the quantities actually produced, not the theoretical ones. The difference between raw material consumed and finished product added is the real waste, and it stays tracked with the batch.
Tracing the cause
Before treating it as a permanent loss, check the usual suspects: raw material of lower quality than usual, delivered weight higher on paper than in reality, weighing mistakes, cooking time or temperature out of standard, new staff not yet trained on that preparation.
When it keeps happening
One abnormal run is an episode; repeated on the same preparation or the same supplier it becomes data. Update the recipe's expected yield if the new reality is stable, or raise it with the supplier using the receiving history as evidence.
What this guide covers
- production waste
- abnormal yield
- processing loss
- real food cost
- waste cause
- quality control
Steps
- Open production and declare the run you carried out
- Enter the real quantity of raw material used
- Enter the real quantity of finished product obtained
- Compare the achieved yield with the recipe's expected yield
- State a reason when the gap is significant
- Record the related loss if part of it was thrown away
- Check the history to see whether the issue is recurring
Common issues
- Yield is always worse than expected → the recipe's expected yield was never updated → recalculate it from a few real runs
- Finished product food cost rises for no clear reason → abnormal waste is not being declared → always record real quantities
- Raw material stock does not add up after production → a theoretical quantity was consumed instead of the real one → fix it with an adjustment and declare real values
- Waste is high only with one supplier → delivered quality or net weight does not match → check the receipts and raise it with the supplier
Frequently asked questions
Is production waste the same as a loss?
No: waste comes from processing and is implicit in the yield, while a loss is a quantity declared unusable (breakage, expiry, contamination).
Do I need to record normal waste separately?
No: it already shows up as the difference between raw material used and finished product obtained.
How do I know whether a yield is really abnormal?
Compare it with the recipe's expected yield and with the history of previous runs of the same product.
Can I correct a production run already declared?
Production runs are not deleted: they are corrected with a recorded adjustment, so traceability stays intact.
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