- Millimetremm
- One thousandth of a metre, about the thickness of a dime. Every number on our drawings is one of these, because saying about an inch is how you get the wrong airplane.
- Drawing
- A picture with numbers on it. A good one lets a stranger who has never met you build the thing without phoning to ask a single question.
- RevisionRev A, Rev B
- Every time a drawing changes it gets the next letter. The letter is how a shop knows it is holding the newest page and not last month's one.
- Prototype
- The first one ever made. It is supposed to be wrong. Finding out how it is wrong is the entire job it was built to do.
- Tolerance
- How far off you are allowed to be. Nothing comes out exactly on the number, so somebody has to decide how much wrong is still fine.
- First article
- Measuring the first real one against the drawing, one dimension at a time, before anybody agrees to make a second.
- MOQminimum order quantity
- The smallest number a shop is willing to make. It is almost always more than you wanted, and it is why small companies buy in awkward piles.
- Gold seal
- The one approved piece we keep in a box. Every one made after it has to match it, and when there is an argument, the box wins.
There is a second bank next door for cloth. Warp, weft, sett, ends per inch. Same rule, same reason: the Fashion Files.