In most industries, missing paperwork is an inconvenience. In regulated and safety-critical work it can mean you are no longer able to prove a part is safe. Here is what good traceability looks like, and how to build it into daily practice.
In any regulated or safety-critical sector, from aerospace and rail to medical devices and nuclear, the same discipline applies: if you cannot prove with records what you made, what it was made from and what it was tested to, then for practical purposes you cannot prove it is safe. Good traceability is what turns "we always do it properly" into something you can actually demonstrate.
Nuclear puts this in its sharpest form, which is why it is worth understanding even if you do not supply the sector. The Office for Nuclear Regulation (ONR) regulates UK nuclear licensees against a set of Licence Conditions. Licence Condition 6 (Documents, records, authorities and certificates) requires that the licensee "make adequate records to demonstrate compliance with any of the conditions attached to this licence", and that those records, once approved, are preserved for 30 years unless ONR agrees otherwise.
That obligation does not stop at the licensee's own gate. It flows down through the supply chain. If a component fails ten years after installation, someone needs to be able to trace exactly what it was, who made it, what it was tested to, and who signed it off. If that record does not exist, or cannot be found, the problem traces straight back to the supplier who made the part.
| Requirement | What it means for you as a supplier |
|---|---|
| Adequate records of compliance | You need to be able to show, with paperwork, that what you delivered met the specification, not just assert that it did |
| Long retention period | Records cannot be treated as disposable once a job is invoiced and closed. In nuclear the reference period is 30 years, not months |
| Approval of record-keeping arrangements | For the highest safety-significance work, your customer's own record-keeping arrangements, which your evidence feeds into, may themselves be subject to regulator approval |
| No unapproved changes to approved arrangements | If a customer's documented process for handling your records is approved by the regulator, they cannot quietly change it without going back to that regulator |
Traceability is not only about proving your own good work. It is the primary defence against counterfeit, fraudulent and suspect items (CFSI) getting into the supply chain. The nuclear industry defines CFSI as goods illegally labelled and represented as original, and warns that almost anything can be copied, including machined parts.
For engineering and design roles, that means defining technical specifications, critical characteristics and acceptance criteria as early as possible. For procurement, it means passing those requirements down through your own supply chain so they form part of goods acceptance, and, wherever practical, buying directly from the manufacturer rather than through unverified intermediaries. There is a companion guide, Spotting Counterfeit Parts, on recognising and responding to suspect items.
A one-page check based on Stage 1: pick a recent job, walk it from raw material to delivery, and note where the trail breaks. NucCol colours, free to use.
Download the one-page toolIt is a legal condition on the licensee, such as the site operator, but it can only be satisfied if the records your work depends on actually exist and are adequate, so the practical obligation flows down to you as a supplier.
In nuclear the standard reference point is 30 years unless the regulator has approved a different period for the specific arrangement. Other sectors set their own periods, so treat your customer's stated requirement as the default.
They are closely related. Traceability is the main practical defence against counterfeit items. This guide focuses on the record-keeping discipline itself; the Spotting Counterfeit Parts guide focuses on recognising and responding to suspect items.
Most gaps show up at handovers, between systems or between people. If you would like a second pair of eyes on how a job is traced from raw material to delivery, we are happy to walk through it with you.
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