Rework or Recut a Large Panel? Use a Cost Decision Worksheet
Compare expected future cost, not sunk cost. Rework cost equals setup, labor, consumables, inspection, and failure probability multiplied by the recut consequence; recut cost includes new material, processing, inspection, disposal, and schedule impact.
Only future cost belongs in the choice
Large-format shops need a consistent decision when labor spent saving a panel exceeds replacement cost.
Observation: a panel has a repairable edge defect but uncertain registration. Controlled calculation: Expected rework = setup + labor + consumables + inspection + failure probability × full recut consequence. Recut = material + processing labor + inspection + disposal + delivery impact. Interpretation compares future cost and acceptable quality. Action follows the lower acceptable risk, not sunk time.
Write both equations before touching the panel
| Scenario | Rework inputs | Recut inputs |
|---|---|---|
| A: cosmetic edge | 0.5 h labor + finish + 10% failure | New panel + full run |
| B: lost registration | 2 h setup + 45% failure + inspection | New stock + controlled run |
| Approval gate | Named manager above shop threshold | Customer approval if appearance changes |
| Decision | Choose lower acceptable future risk | Never ignore safety or specification |
Use your actual wages, material prices and on-time penalties. Example structures teach the calculation; invented universal dollar values would mislead.
Worked scenario A: cosmetic edge
- Freeze and photograph the defective panel.
- Estimate one bounded repair attempt, not unlimited rescue time.
- Calculate probability-weighted recut consequence.
- Compare visible quality and delivery risk as well as cash.
- Record decision owner and stop further attempts at the approved limit.
Scenario A: rework = $20 setup + $30 labor + $5 finish + $10 inspection + 0.10 × $140 recut consequence = $79. A clean recut totals $140, so bounded rework is cheaper if appearance is acceptable. Scenario B: $35 + $90 + $8 + $20 + 0.45 × $180 = $234; recut is $180, so recut wins by $54.
Worked scenario B: lost registration
Replace every example number with shop data and name the approval owner. Unavailable stock may change delivery cost, but it cannot make unsafe or visibly unacceptable repair valid.
Review current format context on the X1S Pro page. Before estimating repair after a smoke-control incident, Large-Panel Smoke Extraction: Test the Four Worst Zones clarifies whether output should have been authorized.
Questions about sunk cost and approval limits
Should hours already spent favor rework?
No. They are sunk. Compare the cost and risk from this moment forward.
What if replacement stock is unavailable?
Availability raises recut consequence but does not make unsafe or visibly unacceptable rework valid.
Can the operator approve every rework?
Define monetary and customer-impact authority before incidents occur.
Choose the lower acceptable future risk
Write the inputs, probability, quality boundary, and approval owner beside the panel photo. Stop when the authorized attempt limit is reached.
