Finish and rework are people issues: a fix for fabrication units

A panel builder sends back four cabinets. The doors will not shut flush. On the hinge side, a long seam was welded in a single run, and the side sheet bowed. The grinder flattened the bead and left gouges, which the powder coat then outlined like a pencil. On Sunday the same welder strips, straightens, refills and regrinds. On Monday the job leaves again. Nothing is written down anywhere.

The hub page on fabrication HR puts it bluntly: rework comes from rushed fit-up, missed marking or poor handover between stages. Each of those is a people habit, and each can be changed.

• Cutting: a stale nest from an old revision, dross under laser-cut edges, burrs left for someone else.
• Bending: a flange short by a few millimetres, a mirror-image bracket, an angle checked on the first piece only.
• Fit-up: a frame tacked out of square, a root gap that varies along the joint, a missed centre-punch mark.
• Welding: distortion from welding one side first, porosity from a draught across the gas shield, spatter balls left behind.
• Grinding and polishing: gouges, flat spots, crossed grain on stainless, heat tint left unpickled.
• Coating: orange peel, masking forgotten on earthing studs, powder clogging tapped holes.
• Handling: dents from stacking without spacers, scratches from a chain sling, stretch film wrapped over wet edges.

It costs welder hours you already paid for once. It costs wire, gas, discs and powder twice. It costs dispatch dates, since rework always jumps the queue. It costs goodwill, because a customer who opens a crate to find a bowed door remembers the brand on the label. And it costs crew morale, because the welder who straightens a fitter's skewed frame on a Sunday rarely does it gladly.

• Fit-up is rushed because a welder is waiting. The fitter tacks fast to keep the torch busy, and squareness pays the price.
• Marking is left to the newest helper. He has a scriber and a tape, but nobody showed him how to check a diagonal.
• Stages hand over without a look. Parts move from bending to fit-up to welding on a trolley, with no one confirming the last step.
• Pay follows speed. A per-piece rate rewards finished counts, never first-time quality.
• Blame replaces cause. The welder blames the fitter, the fitter blames the bend, and nobody records where the fault began.
• Hiring skips the test. A fitter is taken on because he says he can read drawings. Nobody watches him mark a gusset.

• Ask each in-charge to name the last three rework jobs and who did the correction.
• Look at weekend and late-evening hours: rework often lives there.
• Check whether first-offs are signed at each new drawing or tooling change.
• Find out who does marking and whether he was ever shown how to check it.
• Look at how fitters were last hired and whether anyone watched them work first.

1. 1

   Tag every rework, however small

   A red card goes on the part. The finder fills in where it was found and where he thinks it began. No names in the cause box at first.

2. 2

   Collect tags at the board

   The in-charge keeps them in a tray. Each Friday, sort them by the station where the fault began.

3. 3

   Hold a short weekly review

   Crew at the board, top two causes, one change agreed for next week. Keep it to the facts on the cards.

4. 4

   Add a fit-up check before welding

   Square, diagonals, root gap, hole positions against the drawing. The fitter ticks it and the welder confirms before striking an arc.

5. 5

   Sign first-offs at every change

   New drawing, new revision, new tooling, new sheet lot: first piece checked and signed before the batch runs.

6. 6

   Teach the welding sequence for distortion

   Stitch, back-step, balanced sides, clamps and strongbacks. A senior welder shows it on scrap before the next long seam job.

7. 7

   Recognise clean first-time work

   At the weekly review, name the crew with the fewest tags caused. Clean output earns the same credit as fast output.

8. 8

   Test marking and fit-up when hiring

   Ask a fitter candidate to mark a gusset from a drawing and tack a small rectangular frame, then check its diagonals with him.

Job number and part: ________.
Found at station: cutting, bending, fit-up, welding, grinding, coating, packing, customer.
Fault: dimension, angle, square, distortion, porosity, finish, coating, damage, missing part.
Likely began at station: ________.
Corrected by and time taken: ________.
Material or consumables used again: ________.
Date found and date cleared: ________.
Reviewed on Friday: yes or no.

Once a month, look across the tags. If most faults begin at fit-up, look at fitter training, the jigs and how fast fitters are pushed. If they cluster on one shift, look at supervision on that shift. If finish faults follow a site posting, check who covers polishing while seniors are away. The aim is a pattern by stage and crew, not a list of culprits.

Our performance management process work brings measures like this into reviews alongside output. For welding bays specifically, see measuring welders on more than speed. Shops where fit and finish are judged on arrival, such as enclosure and cabinet makers, feel this most. Hiring fitters with a practical test is covered in finding and testing skilled fabrication hands.

Fewer Sunday shifts. Fitters asking welders how their frames came out. A first-off signed before the bundle runs. And the owner, for once, seeing the cost of rework on paper instead of guessing it from late dispatches.