Illustrative inspection checklist

Body and wall

Wall thickness measured, because it decides frost performance

Drainage

Present, clear and the declared size

Rim and edges

Fettled flat, so a row lines up

Feet

Present, level and of the declared height

Colour match

Against the approved standard, not against the previous batch

Coating

Thickness and adhesion on coated parts

Dimensions

Across the batch, not only on the first piece

Marking

Batch identifier legible on the object or its packaging

An illustrative checklist for a fictional range. A real programme defines the tolerance, the sampling method, the inspection window and the remedy if a batch fails.

The four things a programme needs in writing.

The tolerance, the sampling method, the window in which inspection happens, and what happens if the batch fails. Without all four, a failed delivery becomes an argument rather than a process.

Why colour is on an inspection list.

Because a fired or coated body varies between runs, and the variation is only visible when two batches stand together. Checking against the approved standard rather than the last delivery is what catches a drift.