Definition
Post-processing refers to any finishing operation applied after a part's main machining operations are complete, such as deburring, surface treatment, coating, plating, or heat treatment. It's typically the final stage of an operation sequence, sometimes performed in-house and sometimes outsourced.
Why post-processing is easy to underestimate
Post-processing is easy to underestimate in a cost estimate because it often happens after the visible, dominant machining operations, but a required coating or heat treatment can add meaningfully to both cost and lead time, especially when outsourced.
Where post-processing requirements appear
Called out as a note or callout for surface treatment, coating, plating, or heat treatment, often separate from the geometric dimensions and tolerances.
Common mistakes
Overlooking a post-processing requirement buried in a drawing note, underestimating both the added cost and, if outsourced, the added lead time it introduces.
Post-processing is easy to underestimate in a cost estimate because it often happens after the visible, dominant machining operations, but a required coating or heat treatment can add meaningfully to both cost and lead time, especially when outsourced.
See how Blake reviews a partFrequently asked questions
Is post-processing the same as a finishing operation?
Largely synonymous; post-processing usually refers to operations after the main machining is complete, of which surface finishing is a common example.
Does post-processing always happen in-house?
Not necessarily; specialized post-processing like certain heat treatments or platings are often outsourced.
Why can post-processing add more lead time than expected?
Especially when outsourced, it adds supplier lead time and logistics on top of the main machining schedule, which can be easy to miss in a quick estimate.