Rework
Rework turns up in 3 fields: PCBs, brewing, production. Here is what it means to the people in each one.
Rework in PCBs
Removing and replacing parts or fixing joints on an assembled board to correct defects or make changes.
Rework is reprocessing an assembled board so it meets its drawing again: swapping wrong or failed parts, clearing bridges and opens, removing and reballing BGAs. Labs stretch the word to cover adding wires and cutting traces, which IPC calls modification, and rebuilding lifted pads, which it calls repair. The work is done with irons, hot air, preheaters and BGA stations under controlled profiles following IPC-7711/7721 methods, and since every cycle stresses the laminate and pads, the number allowed at one site is usually limited.
"This is the third rework on U5's pads, if one lifts we scrap the board."
Rework in brewing
Off-spec or leftover food product that is safely blended back into a new production batch.
Edible but off-spec or leftover product that is routed back into the production line to be blended with fresh batches. Food and beverage plants use this practice to minimize waste from misaligned packaging, underweight fills, or minor visual defects. Strict tracking is required to ensure the recycled material does not introduce allergens or exceed safety thresholds in the new batch.
"The labeling machine jammed, so we've to uncase those bottles and send the liquid to rework."
Rework in production
The correction of defective, failed, or non-conforming items during the manufacturing process.
Rework involves taking parts or assemblies that failed quality inspections and fixing them so they meet specifications. This might include re-machining a surface, replacing a faulty component, or re-soldering a connection. High rework rates destroy production efficiency because they consume extra labor, materials, and machine time while disrupting the normal flow of goods.
"Put that batch in the rework bin so the second shift can tap the threads deeper."