Spec Drift: Why the Same Line Arrives Differently by Site

Run produce across a multi-site group for long enough and you will meet spec drift: the same line on the same menu arriving ripe in one site and green in another, graded one way for the flagship and another way for the high-street kitchen, a herb bunch that is generous on Monday and mean on Thursday. It is the variance an operations team did not create and spends the morning managing.

Spec drift is not usually a supplier failing on purpose. It is what happens when the standard for a line lives in people rather than on paper — in the head of the chef who set up the account, the driver who knows which site is fussy, the buyer who substitutes from memory. People move on, cover shifts change, and the standard moves with them. The line keeps arriving; it just stops arriving the same.

Where the drift opens

The gap opens at every point where the spec is implied rather than written. A new sous chef phones an order without the grade. A supplier is short and a buyer calls a like-for-like by feel rather than against a sheet. One site's delivery is checked hard at the door and another's is waved through. None of these is dramatic on its own, and together they are why the same line lands differently across the estate.

The cost is rarely a single dropped service. It is the slow tax of inconsistency: a plate that looks different by site, a chef re-checking what should be settled, a guest who notices that the dish they liked last month is not quite the dish today. The menu was meant to be the constant. Drift makes the supply the variable.

One approved spec, held on every order

The fix is to move the standard off people and onto an approved spec sheet, then hold it. The spec carries the product, the count, the grade, the origin and the pack per line — set once with the Group Executive Chef and held on every order, so the same line is built to the same standard wherever it runs. When the buying team holds that sheet, the line is set, not guessed.

The substitution rule is the part that usually leaks, so it is written down too: when the market is short, a like-for-like is called against the spec, not silently swapped, and the swap rule is the kitchen's, not the supplier's. That single discipline closes the most common source of drift — the quiet substitution that nobody approved.

Drift is measurable, so measure it

You do not have to take drift on faith. Pick one repeating line — a tomato, a leaf, a soft herb — and have two sites photograph it at the door for a week against the same agreed spec. The gap between the photos is your drift on that line, and it is the figure worth managing, not an industry average. Once the spec is approved and held, run the same week again: the photos converging is the proof the standard is now on paper, not in a head.

If the same line is arriving differently across your sites and you want it set once and held everywhere, book a call and we will walk through how the spec sheet is built and held across a group.

Frequently Asked Questions

What is spec drift in a restaurant group? Spec drift is the same menu line arriving differently across sites — ripe in one kitchen, green in another, graded or portioned inconsistently — because the standard for that line lives in people rather than on an approved sheet. As staff and routines change, the standard moves with them and the line stops arriving the same way.

How do you keep a consistent produce spec across restaurant sites? Move the standard onto an approved spec sheet — product, count, grade, origin and pack per line — set once with the executive chef and held on every order, with the substitution rule written down so shorts are called as a like-for-like against the spec, not swapped silently. The buying team holding that sheet is what keeps the line consistent site to site.

Can you prove spec consistency between sites? Yes, by measuring it. Have two sites photograph the same repeating line at the door against the agreed spec for a week; the gap between the photos is your drift on that line. Approve and hold the spec, run the week again, and the photos converging is the evidence the standard is now on paper rather than in a head.