At a glance

When scope moves mid-job, most fabrication shops face a false choice. Say yes and absorb the extra work so the customer stays happy, and margin quietly dies. Insist on a full formal re-quote before anyone touches metal again, and the schedule dies while the job sits. Neither option is professional control. A clear mid-run change-order price path lets the shop name the cost, keep workable jobs moving, and stop “free scope” becoming the default.

This is not the same problem as building a tight first quote. It is what happens after acceptance, when the drawing, quantity, finish, or delivery expectation shifts while the job is still open.

The false choice: absorb it free or stop the job

Australian job shops live on relationships. Customers call mid-run with a revised DXF, an extra hole pattern, a thicker plate, a finish change, or a “can you just add these to the same delivery.” The supervisor hears urgency. The estimator is busy. The owner does not want an argument on a job that is already late.

So one of two habits takes over.

The first habit is goodwill absorption. The floor does the extra work. Nobody writes a price or extends the due date cleanly. At invoice, the job looks busy and thin. Later, did that fabrication job actually make money becomes a post-mortem with no clear place to put the change.

The second habit is full stop. Production freezes until estimating rebuilds a complete quote as if the job were new. That protects margin on paper. It also parks WIP and teaches the customer that every small change means days of silence. The same instability behind why job shop production schedules break gets worse: inserts, holds, and verbal promises pile onto a fragile plan.

Both habits feel reasonable in the moment. Both are expensive. The third path is better: price the delta fast enough that the schedule can continue under an agreed change, not under hope.

What counts as a mid-run change order

A mid-run change order is any customer-driven (or mutually agreed) move in scope after the original quote or order confirmation, while the job is still open.

Shop-driven overruns (bad nest, wrong cut, forgot an op) are not change orders. They need visibility, but they are not a customer price conversation. Mixing the two is how free work becomes policy. If the team cannot say whether a mid-job request is a priced change or an internal miss, the floor will treat almost everything as free.

Why “just do it” empties the margin

Absorbing a change feels small because each request looks small: an extra bend, a revised flange, a finish tweak, a handful of added parts. Separately, each is easy to justify as relationship maintenance. Together, they rewrite the job the quote never sold.

Three things usually go missing when the answer is an informal yes.

The delta is never costed. Nobody asks what the change adds in material, machine time, labour, outside process, and disruption. The original quote stays the commercial story even though the work is different.

The schedule pretends nothing moved. Due dates stay put. The change is inserted as heroics, which is how whiteboards diverge from reality and why live schedules beat status theatre.

The invoice arrives as a surprise or a silence. The shop either under-invoices and eats the cost, or tries to recover later without a trail, which damages the relationship the free work was meant to protect.

Goodwill is a real tool. It should be a conscious, bounded choice, not the accidental result of having no mid-run price path.

Why waiting for a full re-quote stalls the schedule

The opposite extreme is also common: every change waits for a complete new quotation package. That habit grows out of a fair fear. Estimators have seen thin jobs. Owners have seen customers reject late price adjustments. So the shop rebuilds every line before production continues.

WIP sits. Nested sheets wait. Other jobs reshuffle into the hole. By the time the formal quote lands, the commercial win may be real, but the schedule has already paid.

Full re-quotes matter for large redesigns. They are the wrong default for a mid-run delta that can be priced from known rates against remaining ops. The quoting problem fabricators already know (slow quotes cost good jobs) does not disappear after acceptance. Mid-run, slow commercial response costs schedule instead of the original order.

A clear mid-run change-order price path

You do not need a perfect contract office. You need a path the floor, estimating, and the customer can recognise.

Name the request as a change before work continues

Log “revised DXF” or “extra brackets” against the open job as a change request, not a quiet side task. If metal or programming would start before a price exists, stop that specific delta. Untouched original scope can keep moving when it is still clean.

Price the delta, not a brand-new fantasy job

Build the change from the same cost categories you trust on the first quote: material, machine, labour, setup or reprogramming, outside process, freight or packing if relevant, and margin. Remakes and scrap caused by the revision belong on the change when the customer moved the target.

Separate stop-the-job changes from continue-under-authority changes

Some changes must freeze original ops (wrong thickness already nested, finish incompatible with remaining process). Others can continue on the untouched portion while the delta is priced. Write which kind it is. Ambiguity creates either free work or total freeze.

Agree price and time impact in the same conversation

A change order that names dollars but leaves the due date untouched is half a commercial decision. Disruption, overtime, and vendor lead time belong in the path. If the date cannot move, the premium should say so explicitly.

Record acceptance before the floor treats it as real

Email, portal, or signed mark-up is enough. Production, estimating, and accounts need one story: this scope moved, this price applies, this date applies.

Attach the change to the open job’s margin view

Unpriced changes are one reason mid-job margin goes blind. Priced changes should attach to the job so labour and material on the delta do not look like unexplained overrun on the original quote.

Diagnostic checklist: can you price a change without freezing the floor?

If most answers are “no,” the shop does not have a customer problem first. It has a mid-run commercial path problem.

How this sits with quoting speed and mid-job margin

Before acceptance, slow or guessed quotes decide whether you win good work with a defendable price. After the job closes, actual versus quoted margin teaches the next estimate. Mid-run is the window where scope can still move with the customer in the conversation, and where the schedule either flexes under an agreed price or breaks under silence.

A shop can have a sharp first-quote template and still leak margin through unpriced mid-run yeses, or wreck delivery by treating every revision like a brand-new tender. The path above is the middle: fast enough for the floor, clear enough for margin, recorded enough for the invoice.

FAQ: change orders mid-job

What is a mid-run change order in fabrication?

Any agreed scope move after the original quote or order confirmation while the job is still open: drawing revisions, extra features, material swaps, quantity changes, finish or outside-process adds, or delivery pull-forwards that change cost or disruption.

Should every change freeze production until a full re-quote?

No. Large redesigns may need a full stop. Many deltas can be priced from known rates against remaining work, with a clear call on whether untouched ops may continue. Defaulting to a full freeze protects paper margin while burning schedule.

How do you price a change order quickly without guessing?

Use the same cost building blocks as the original quote (material, machine, labour, reprogramming or setup, outside process, packing or freight, margin). Cost the delta and remake risk caused by the revision. Agree time impact with the price.

What is the difference between a change order and a shop overrun?

A change order is customer-driven or mutually agreed scope movement. A shop overrun is internal miss (wrong cut, forgotten op, poor nest). Price conversations belong to the first. Process and training belong to the second. Mixing them trains everyone to treat extras as free.

How do unpriced changes show up at month-end?

As thin actual margin, unexplained labour or material variance, and invoice arguments. By then the chance to agree price and due-date impact is usually gone.

Final thought

If you want that path without another spreadsheet beside the whiteboard, talk to the team.