When a supplier, material or process change means the assessment must be revisited

A supplier change is easy to file as a purchasing matter and hard to recognise as a safety matter. The new timber may come from a different species, a different forest, or a different drying process, and each of those differences can change how the board behaves when wet, when hot food rests on it, or when a knife scores its surface repeatedly.

The buyer who agreed the change should therefore trigger a review, not merely inform the assessor as a courtesy. The review starts with a simple question: what properties of the old timber did the original assessment rely on, and does the new timber share those properties. If that question cannot be answered from supplier documents, the review cannot be completed on paper alone.

Splitting is the most direct new sequence. A board that splits along the grain when wet can produce splinters, trap food and moisture in cracks, and eventually break under a heavy cleaver. The review should compare grain, moisture content, and finish between old and new timber, and should handle boards from the new supplier to see how they respond to soaking and drying.

Warping and finish changes form a second group. A board that warps will rock on a counter, making knife work less stable, while a finish that wears faster may expose raw timber sooner. Both sequences depend on the new timber and its treatment, not on the board's shape, which may be unchanged.

Illustration: a brand receives 50 boards from a new supplier and imagines that 20 of them, in round illustration terms, show a small split after repeated soaking. Those figures, as presented in When a supplier, material or process change means the assessment must be revisited, are invented, not measured. They are useful because they force the review to define a threshold in advance: how much splitting, after how much soaking, should lead to a design change, a finish change, or a return to the old supplier.

Without that threshold, a review can drift into vague reassurance. With it, the brand can handle boards, record results, and make a decision that a later reader can follow and, if needed, challenge.

The review should end with a dated decision, not with a meeting note that says the change was discussed. The decision might be that the assessment stands, that a sequence needs updating, or that further handling is required before selling boards from the new supplier. Each option is legitimate, provided the reasons and the evidence are written down.

• Identify the timber properties the original assessment relied on.
• Compare old and new timber documents, grain, and finish.
• Handle new boards through soaking, drying, and knife use.
• Record a dated review decision with reasons and next checks.

A common failure is to record the supplier change in purchasing files and never touch the assessment. Months later, a splitting complaint arrives, and no one can tell whether the assessment was reviewed, because the review never happened in a form that leaves a trace. Purchasing records are not safety records, even when they mention the same supplier.

Another failure is to review only the changed property. A new timber may affect splitting, warping, weight, and finish together, and a review that checks splitting alone may miss a warping problem that emerges only after the board is sold and used daily.

Close the review by telling the people who sell and answer questions about the board what changed and what to watch for. A customer service team that knows the new timber splits more readily when soaked can give useful care advice, while a team kept in the dark cannot.

Keep the review note with the original assessment, so the file tells a story of change over time: an original judgement, a supplier change, a review, and a new judgement where needed. That story is the assessment, not a single snapshot frozen at launch. The brand should also keep a sample board from the new supplier beside the review note, so a future reviewer can handle the actual timber instead of relying only on written descriptions.