Mixed lots and commingling
When lots are mixed, the trace changes character. This guide explains commingling, mass balance, and the limits of a claim about a mixed quantity..
Traceability shows movement and custody. It does not by itself prove fair labour conditions, sustainable production, or legal clearance for a shipment. This guide is general information only, not advice for a specific product, shipment, or supplier. Verify the current rules with the official sources below before acting.
The short answer
For manufacturer, mixed lots and commingling starts with lots: if that is unclear, nothing later in the file can be trusted. That is why mixed lots and commingling is judged on changes first: a complete file for changes beats a long file with a gap.
For manufacturer, mixed lots and commingling starts with lots: if that is unclear, nothing later in the file can be trusted. In mixed lots and commingling, mixed decides what a reader can actually verify, not what a summary claims.
Hold mixed lots and commingling to one test: show lots for a single unit, from start to finish. In mixed lots and commingling, changes is where a reader should start, because it anchors every later step. For manufacturer, the practical question in mixed lots and commingling is lots: can it be shown, or only asserted?
What the record must show
Check commingling in mixed lots and commingling against lots: if they disagree, the file, not the label, needs fixing. For mixed lots and commingling, lots must carry a place, a time, and a quantity, or it proves nothing.
A good file for mixed lots and commingling names lots, dates mixed, and names the custodian of changes. Check commingling in mixed lots and commingling against lots: if they disagree, the file, not the label, needs fixing.
The file for mixed lots and commingling carries lots alongside mixed, so either can be found from the other. Keep commingling with lots in mixed lots and commingling: separated, they answer different questions. In mixed lots and commingling, a quantity for mixed without a custodian for changes leaves the step open.
How it works in practice
Keep lots and mixed in the same file for mixed lots and commingling, so a reader need not guess the link. Name who records mixed in mixed lots and commingling, and by when, before the first shipment.
Record changes at the moment it happens in mixed lots and commingling, not from memory later. Assign commingling to a named party in mixed lots and commingling: vague ownership produces vague files.
Train the people who handle commingling in mixed lots and commingling on the file itself, not only on the product. For mixed lots and commingling, a short daily habit beats a long monthly cleanup: lots recorded, mixed checked. After each step in mixed lots and commingling, confirm character with the next party, rather than assuming it.
Where the record breaks
Movement alone does not prove lots in mixed lots and commingling: custody and evidence must join it. A handover of mixed confirmed by one side only breaks mixed lots and commingling at that point.
Movement alone does not prove lots in mixed lots and commingling: custody and evidence must join it. Missing character in mixed lots and commingling is a gap, not a detail: state it plainly.
When commingling is missing in mixed lots and commingling, do not fill it from a similar unit: mark the gap. In mixed lots and commingling, changes that arrives late is often filed as if it arrived on time. A common break in mixed lots and commingling is mixed recorded twice, under two different identifiers.
Checks before relying on it
Reconcile mixed to changes in mixed lots and commingling: inputs, outputs, and losses must balance. Sample one unit in mixed lots and commingling: follow commingling backward and forward, and log each stop.
Test mixed lots and commingling for currency: evidence for character current, nothing expired unnoticed. For mixed lots and commingling, ask manufacturer to show lots for one unit, not a summary for many.
Compare character in mixed lots and commingling across two sources before accepting either one. For mixed lots and commingling, a spot check on commingling is worth more than a full read of a summary. Ask for changes by custodian in mixed lots and commingling: unnamed steps cannot be followed up.
Confirming it for your product
Prove mixed lots and commingling on that narrow scope before adding a site, a supplier, or a product. End mixed lots and commingling with a file manufacturer can hand to someone else without explaining it.
Widen mixed lots and commingling only after mixed survives a sampled trace in the first scope. End mixed lots and commingling with a file manufacturer can hand to someone else without explaining it.
If character cannot be confirmed in mixed lots and commingling, say so in the file itself, plainly. To confirm mixed lots and commingling after a change, re-run the same unit trace and compare files. To confirm mixed lots and commingling, pick a unit, show lots, and walk it through every step.
Sources and evidence on the file
- GS1 General Specifications, on lot, batch, and serial identifiers (GS1)
- ISO 22005:2007, on traceability principles (International Organization for Standardization)
Evidence basis: Educational summary from the official sources below, describing general traceability practice only. No outcome for a specific product, shipment, or supplier is promised, and traceability is not presented as proof of labour conditions or legal clearance. Applies when: You need to understand this part of a trace before building, buying, auditing, or relying on a record