What it means
A part can fail a specification yet still be repairable, and rework gives it a controlled route back to the required condition. The decision should come from an authorised quality or technical role, not convenience on the production line.
A fictional batch of 100 brackets with burrs on an edge might receive an engineering-approved deburring method for the affected units and a requirement for a fresh dimension check. Identify the nonconformance first by stating the exact requirement, observed result, quantity, lot and location, because "fix these" is not enough for a technician to follow or an auditor to review.
If a fictional operator finds holes outside tolerance, quality records measurements and serials before deciding whether any safe rework method exists. Isolate the goods while the decision is pending: Infor's nonconformance guidance describes immediate isolation when nonconforming material is found, and its quarantine process records dispositions including rework, although specific system steps vary, and a fictional warehouse that blocks a suspect pallet does not put the goods back into sellable inventory when someone merely requests rework.
An authorisation should explain the method, tools, limits and safety controls, since some work can weaken a material or invalidate a certification, and technical reviewers must check the consequences. A fictional welded component with a crack needs a specialist to decide whether an approved repair procedure exists, instead of allowing a quick grind and repaint.
Rework differs from a use-as-is concession because rework aims to meet the original requirement after correction while a concession may permit a stated deviation; machining a fictional part again to meet its drawing is rework, but accepting it with a smaller dimension would require a different authorised decision, and neither should be confused with silent acceptance. The process may need customer approval under a contract or regulated quality system, so check the applicable requirement before work and do not generalise one industry's rule to every product.
A fictional aerospace supplier that finds a defect checks its customer agreement and quality procedures before deciding who can approve repair. Record labour, parts, scrap and delay, because rework may be worthwhile for an expensive component but uneconomic for a low-cost item, and economics never override safety or specification; give the job a unique reference linked to the original lot, splitting the record and reconciling quantities when only some units are affected.
Specify who can execute and who verifies, because the person who performs the work may not be the best independent reviewer for a safety-critical item, and document actual results, not only a checkmark. A fictional technician polishes a surface and an inspector checks the finish and dimensions with calibrated equipment.
Retest against the relevant specification, since a corrected visual appearance may hide a remaining functional fault; a fictional electronic board with a replaced component passes a full functional test before release, not just a photograph of the solder joint, and if rework fails the item needs a new disposition decision rather than indefinite repetition or a quiet shipment, with attempts and material effects tracked. Update drawings or work instructions only through change control, because a one-off rework method is not automatically a new standard production route; a fictional team that learns a fixture causes burrs repairs the fixture and keeps the authorised rework instructions for the affected lot only.
Communicate status to planning, since rework can change delivery dates and available quantity, and promise only units that can be completed and verified; some goods also have shelf-life or handling limits, so a qualified reviewer should assess cumulative effects, as when a fictional seal tolerates one cleaning cycle and a second harsh solvent treatment is not authorised. Track rework rates as a quality signal because frequent rework is costly and can mask a process that is not capable, and close the authorisation only after execution, inspection and record updates, since approval to attempt rework is not proof that the item passed.
In practice
Real-world examples.
Example
A manufacturer of steel brackets approves a specific deburring method for 40 units from one lot. After the work, each unit is remeasured with calibrated gauges, and only those within tolerance move back to available stock.
Example
An electronics assembler replaces a faulty capacitor on a batch of control boards. Each board then passes a full functional test before it is released, not just a visual check of the solder joint.
Example
A furniture maker reworks a set of chairs with chipped finish, but two of them fail the post-rework surface test. Those two units stay on hold under a new disposition decision instead of being shipped to a customer.
Formula
Calculation
Illustrative rework yield = reworked units passing required checks / units submitted for rework x 100; report rejects separately.
Worked example. A fictional lot of 100 panels has 30 scratched units authorised for rework, and 28 pass the required surface and dimension checks. Rework yield = 28 / 30 x 100 = 93.3%, and the 2 failures (6.7%) remain on hold for a new disposition decision.
Add cost to see whether the rework paid off. If each reworked panel takes $15 of labour and materials, the 30 attempts cost 30 x $15 = $450. If each panel is worth $120 as conforming stock, the 28 recovered units are worth 28 x $120 = $3,360, so the net recovery is $3,360 - $450 = $2,910, before counting the 2 scrapped panels.Case study
Seen in the real world.
In this fictional case, Elm Fabrication holds 30 scratched panels from a 100-unit lot. An engineer approves a specific finishing method and inspection criteria. Twenty-eight panels pass; two fail a surface test and remain on hold. Only the 28 verified units rejoin available inventory, with the original lot and rework record linked.
The production planner had originally promised all 100 panels to the customer by Friday. After the failures, she revises the commitment to 98 panels and tells the customer when the remaining two will be replaced. Elm Fabrication also sends a note to the tooling team, which traces the scratches to a worn clamp, so the root cause is fixed rather than endlessly reworked.
Watch out
Common mistakes.
- Starting rework before an approved method exists.
- Treating authorisation as evidence of successful repair.
- Losing lot and quantity traceability during rework.
Questions
People also ask.
Is rework the same as use-as-is?
No. Rework aims to bring an item into conformity.
Can anyone authorise it?
Use the qualified authority named by the relevant quality and contract process.
What happens after rework?
Perform the required checks and record release or another disposition.
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