Colour-coded boards

Assigns a physical cutting surface to a category of product, so a cross-contact decision is made by which board is picked up rather than by memory.

The control is SEPARATION. Colour is only the interface that makes that separation legible at a glance and auditable by a manager standing at the door, and four things decide whether it works — none of which is the colour itself. First, the scheme must be written down and posted where the boards live, because a scheme that exists only in the head of whoever introduced it lasts precisely until the first new starter. Second, storage has to make the correct board the nearest board: a rack that presents each one individually is a control, while a stack on a shelf is a queue in which whatever is on top wins. Third, the same categories must be applied the same way by everyone on every shift, which is a training and audit question rather than an equipment one. Fourth, and this is the part almost never inspected, the surface has to stay cleanable — a board scored with deep knife cuts cannot be brought to a sanitised state whatever colour it is, because the cuts hold residue below the depth a cloth or a brush reaches, and a warped board rocks under the knife, which is both a cutting hazard and the reason boards get scored in the first place. On a coffee bar the categories that actually matter are usually ready-to-eat garnish and fruit, unwashed produce, allergen-bearing items, and non-food. WHICH COLOUR MEANS WHAT IS NOT SET HERE: schemes differ between jurisdictions and between operators, and the one that governs is the one the local food authority applies and the operator writes down. This site names the principle and leaves the colours to them.

• Write the scheme before you buy the boards, post it where the boards are stored, and confirm it against what the local food authority requires — the colours in a supplier's catalogue are that supplier's convention, not a rule, and the scheme that governs is the one the inspector applies and the operator has written down. A colour set bought without a written scheme is decoration that looks like a control, which is worse than no control at all because it passes a glance.
• Buy the storage rack in the same order as the boards, and treat it as the more important half. A rack that presents each board individually makes the correct one the nearest one; a stack makes the top one the nearest one, and under pressure the nearest board always wins. Almost every colour-coding failure is a storage failure wearing a different name.
• Set the retirement trigger as an inspection with a written threshold, and give it an owner and a place in the schedule. Boards do not expire on a date; they expire when the cuts are deep enough that residue sits below the reach of cleaning, and a board that has passed that point is a hazard in the exact colour that says it is safe. Nobody retires a board that still looks like a board unless somebody is asked to look.
• Size boards to the largest cutting task and to the wash equipment together, and check the second one physically. A board that does not fit the sink or the rack is a board wiped down at the counter for the rest of its life, and that single dimension mismatch quietly voids the whole system.
• Give allergen-bearing work its own board, its own storage position and, where the venue can manage it, its own wash path. This is the one category where the failure is a person harmed rather than a drink spoiled, and it is also the category most likely to be improvised around, because the allergen board is used rarely and therefore never at hand.
• Specify grip before appearance. A board that rocks or slides is a cutting injury and it is also the reason boards get scored deeply — a knife that skids takes a deeper cut than one that does not, so the non-slip surface is buying cleanability as well as safety.
• Test the scheme against a new starter's first shift, deliberately, and treat any question they have to ask as a defect in the system rather than a gap in their training. A colour scheme is only a control if it works without a conversation; if it needs explaining every time, what is actually controlling cross-contact is whoever happens to be supervising.
• Do not let boards leave the bar for other uses. A board that goes to the back for a delivery, a repair or a staff meal returns as an unknown, and the whole model depends on every board's history being knowable from its colour.