Process Change Notices: When the Mug Quietly Changes Between Orders

A buyer receives a repeat order and something is slightly off. The shade is a touch warmer. The rim feels a little different. The weight is within tolerance but the mug sits differently in the hand. Nobody announced a change, and the factory says nothing has changed.

Products in this guide: Vintage Caramel Brown Stoneware 4-Piece Set · Ceramic Salad Plates

Sometimes nothing has. More often, something did, and it was treated as an internal production decision rather than a decision the buyer had a stake in.

See the full ceramic sourcing process map.

The five changes that matter

Body or clay source. A change of clay supplier, or a blend adjustment when a source runs short, alters colour response, shrinkage, and sometimes absorption. It is the change most likely to be invisible in the short term and visible in the second year.

Glaze formulation. Even a minor substitution — a different frit supplier, a pigment from a different batch — can shift shade and surface. Glazes are recipes, and recipes drift when components are substituted.

Decoration method or ink. A switch between screen and decal, or a change of ink supplier, may keep the design identical on paper while changing its durability and its exact tone on the fired piece.

Dimensional adjustment. A mould wear correction, a small change to a handle, a revised foot ring. Each is small, and each changes how the piece stacks, how the lid fits, and how many fit in a carton.

Packing configuration. A different inner packing, a thinner carton, or a change in units per case. This one is invisible until the goods arrive, and it changes freight, warehouse handling, and breakage.

Three notification levels

Not every change deserves the same process. A workable structure has three levels, agreed before the first order.

Level one: notify before implementing. Changes that alter anything the buyer specified or approved — body, glaze, decoration, dimensions, packing. These require written approval before production.

Level two: notify at implementation. Changes that affect internal process but not the finished specification — a new kiln for the same profile, a reorganised line. These require notice, not approval.

Level three: no notice required. Consumables, staffing, scheduling within the agreed window. Requiring notice for everything produces noise and trains the supplier to stop reporting.

The value of the structure is that it gives the supplier a clear test. When in doubt, the question is not whether the change is important, but whether it touches something the buyer approved.

The master sample guide explains how sealed references keep batches identical.

What to re-verify after a change

A change approval is not a formality. Each level one change should carry a defined re-verification.

A physical sample. Not a photograph. For body, glaze, or decoration changes, a fired sample from the new condition, assessed against the sealed retained sample.

A dimensional check. For mould or handle changes, the four numbers that matter: capacity, height, rim diameter, and weight.

A packing test. For packing changes, an assembled carton with its actual count, checked for fit and compression.

A written record. The approval, the date, and the sample reference, added to the specification pack. Without this the change becomes the new normal and the next order inherits it silently.

The quote validity guide explains how to hold prices on long programs.

The clause that prevents silent substitution

Most supply agreements include a quality clause and a confidentiality clause, and neither prevents this. What prevents it is a change control clause with four elements.

1. A definition of what counts as a change — the level one list, written out rather than implied.
2. A prohibition on unapproved substitution, with the consequence stated: rejection, replacement, or cost recovery.
3. A notice period, so the buyer has time to assess rather than react after the fact.
4. A record obligation, requiring the supplier to maintain and provide a change log on request.

The fourth is the one buyers rarely ask for and the one that makes audits possible. A supplier that keeps a change log can answer a question about the last two years in minutes. A supplier that does not will answer from memory.

Why suppliers make silent changes

It is worth understanding the motive, because it is not usually deception.

A material runs out and production must continue. A pigment batch is discontinued. A machine is down and the work moves to another line. In each case, the person making the decision is a production manager solving today's problem, and the buyer is not in the room.

That is exactly why the mechanism has to exist in advance. It is not a control imposed on a bad actor; it is a channel that lets a good supplier tell you something it would otherwise handle internally.

The honest boundary

No clause eliminates drift. A glaze can shift within its own tolerance band without any change being made, and hand-applied decoration varies by nature. What a change control clause does is separate the two cases: variation that is inherent to the process, and variation that came from a decision nobody told you about.

The practical first step is cheap. Take the last order, write down the four numbers and the approved shade reference, and keep them as the baseline for the next one. A repeat order that is checked against a record is a repeat order. One that is checked against memory is a new order with an assumption attached.