The first run teaches the shop what the drawing did not say. What gets locked after a part has run once, what gets re-checked anyway, and where repeat savings actually come from.
A job traveller follows the part through every operation. What gets written on it, how revisions are handled, and why the record is worth reading after delivery.
Access decides weld quality as much as the machine does. When a joint is welded at the bench, when it goes on a positioner, and how rotation changes purge and technique.
Forming decides how a part fits before the arc ever starts. What a press brake and a set of rolls actually control, and why spring back and bend allowance have to be planned rather than corrected.
Wire EDM cuts with sparks instead of an edge. Where a no-force cut helps fabricated profiles, what the process cannot do, and what to define before a part goes on the wire.
Jigs and fixtures are not the same thing, and they do not have the same working life. Which tooling is stored with the part number and which is remade for every job.
A sample mould answers whether a shape works; a production mould answers whether it can be made the same way again. How a fabrication shop chooses the tooling route for custom metalwork.
Springback opens a bend and work hardening stiffens the metal, so a tube rarely leaves the bender where the drawing put it. How shops compensate and why matched runs demand more care.
