When 3D printing moves from hobby to production, quality control becomes the business. Here's the production QC stack.

Input QC (before printing)

  • Filament: diameter spot-check on arrival, moisture check for PA/PC
  • Calibration: first-layer, flow, temperature — per material lot
  • Environment: humidity logging in the print room

Process QC (during printing)

  • First-article inspection (FAI): full dimensional check of the first part per batch
  • In-process monitoring: camera + failure detection (most 2026 slicers have it)
  • Statistical sampling: check dimensions every N parts (e.g., 1 in 20)

Output QC (the records)

Keep a lot record: filament batch code, printer, settings file, operator, inspection results. When a customer complains, the record tells you in minutes whether it was material, machine or operator. That traceability is why we batch-code every spool — it closes the loop.