A transformation record should answer which physical inputs entered a process and which physical outputs emerged. The process name alone cannot carry that history.
Fix the process boundary
Record the operation, time window and facility before connecting lots. A drying step, milling run or chemical conversion may have different boundaries; state what the record covers so a later reader does not infer more than was observed.
Name every documented input and output
Link input lot identifiers, quantities and units to output lots, residues, samples or waste streams where recorded. An output that is not quantified should remain listed as unmeasured. Keep process sheets, weighbridge tickets and laboratory results attached to the particular claim they support.
- Input and output lot identifiers
- Quantity, unit and measurement basis
- Process event and facility
- Source documents and reviewer state
Separate lineage from allocation
A many-to-many transformation can show that several inputs contributed to an output. That does not establish the exact fraction of each input in each output. An allocation claim needs its own defensible method and evidence.
What this looks like in practice
Two incoming concentrates enter one blending run. The output lot is linked to both input lots and the batch sheet. The record says both may contribute; it does not say each is present at exactly 50%.
This is a record design guide, not a mass-balance calculation method or certification scheme.
Primary references
These sources inform the general traceability or due-diligence context. The worked example and operational recommendations above are Atlas editorial guidance.