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.

Production and kitchen managersproduction:manageReading: 3 minUpdated on: 2026-09-19

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.

The production module with ongoing runs and yields — Desktop view (browser)

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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