A job traveller is the document that moves with a part or a batch through the shop. It carries the part's identity, the operation it is at, and the record of what has been done and checked. In a small shop it may be a printed sheet in a plastic wallet or a bound set of cards; the point is not the format but that the information stays with the work rather than with the person.
Its value shows up when something needs to be explained: which revision was made, who welded it, what was measured and what the result was. Without it, the shop is reconstructing a job from memory, and memory is selective.
It is also the simplest tool a shop has for stopping a part going out of sequence. If the traveller is at operation four, nobody has to guess whether operation three happened.
The content varies with the part, but the pattern is consistent. Part number and description, revision level, material, quantity, the operation sequence, and a place for each step to be signed off as complete. Where a drawing or a 3D file defines the part, the traveller references it rather than repeating it.
Then come the results. Measurements taken at an inspection point, hardness checked on a sample, the outcome of a pressure or leak test where one applies, and the disposition of anything that did not meet the requirement. A traveller with empty results columns is not a record; it is a form.
Format is a practical choice rather than a standard. A printed sheet that travels in a sleeve and gets signed at each bench suits a shop where parts are large and move slowly. A travel card that stays with a small part in a tray suits batch work where many identical pieces are in progress at once. What matters is that the document is with the work while the work is being done, not filed away in an office.
Most jobs change at least once. A customer moves a bracket, an engineer adjusts a dimension to clear a nearby component, or a fit issue found at assembly requires a small change to a formed edge. Each of those changes has to reach the shop as a revision, not as a verbal note carried by whoever was on the phone.
Revision control on a traveller means the part number stays, the revision identifier changes, and the paperwork makes clear which parts were made to which version. Without that, a mixed batch is indistinguishable from a correct one until something does not fit.
Traceability means being able to connect a finished part back to what it was made from. On a welded assembly that may mean the material lot, the filler wire, the consumables used and the operator who ran the weld. On a soft part such as a hose it means the compound and the construction.
The traveller is where that chain is recorded, which is why the material identification on a job matters as much as the drawing. If the material cannot be identified on the record, the rest of the traceability is guesswork, and the welded parts cannot be traced back to a known starting point.
For custom work, the traveller is often the only document that explains what the customer received. It confirms which revision was made, what was measured, and what was checked before the part shipped. Where a customer is fitting a part into an assembly of their own, that record is the difference between a known quantity and an assumption.
It also closes the loop on a question that comes up later. If a part is ordered again months afterwards, the traveller is what allows the second order to match the first.
The failure mode is always the same: the paperwork is filled in afterwards, from memory, at the end of the shift. At that point it records an intention rather than an event. The fix is to make the record part of the operation, so the measurement is written when it is taken and the sign-off happens when the step finishes.
The other common failure is a traveller that is too ambitious. If the form asks for six data points and only two matter, the operator will focus on the two and fill the rest in. A shorter, honest record beats a long one nobody trusts.
A job traveller is not a certificate, and it is not a marketing document. It records what was done and what was measured on that job. Where a customer needs a dimension checked that is not on the drawing, that requirement has to be agreed before the job starts, because it will not appear on the record by itself.
It is also not a substitute for a first article. The traveller documents the checks; the first-article inspection is what proves the process can produce a conforming part.
If the record matters for your part, these are the points to settle at the quotation stage rather than after delivery.
Records travel with everything that leaves this shop, from finished exhaust assemblies and formed tube work to smaller fabricated parts. The custom work page explains how a job is set up and specified, and our material pages cover how the stock that goes on the record is identified.
