01A to F
- AQL, acceptance quality limit
- Quality level used to index sampling plans in ISO 2859-1. See AQL guide.
- APQP
- Advanced product quality planning. See APQP.
- CAPA
- Corrective and preventive action.
- CMM
- Coordinate measuring machine.
- Concession
- Permission to use or release product that does not conform to specified requirements.
- Cpk
- Process capability index including centring. See capability guide.
- DFT / WFT
- Dry and wet film thickness of coatings.
- Expediting
- Monitoring and promoting supplier progress to secure delivery dates.
- FAI
- First article inspection.
- FAT / SAT
- Factory and site acceptance tests.
- FMEA
- Failure mode and effects analysis.
02G to N
- GD&T
- Geometric dimensioning and tolerancing (ISO GPS or ASME Y14.5).
- HAZ
- Heat affected zone of a weld.
- Hold point
- ITP point beyond which work may not proceed without inspector attendance or waiver.
- IQC / IPQC / FQC
- Incoming, in-process and final quality control.
- IRN
- Inspection release note, authorising shipment after inspection.
- ITP
- Inspection and test plan.
- MDR / MRB
- Manufacturing data report or manufacturer's record book: the final quality dossier.
- MSA
- Measurement system analysis.
- MTC
- Material test certificate, often to EN 10204 3.1.
- NCR
- Nonconformity report.
- NDT
- Non-destructive testing: VT, PT, MT, UT, RT and others.
03O to Z
- PMI
- Positive material identification.
- PPAP
- Production part approval process.
- PQR / WPQR
- Procedure qualification record (ASME, AWS) or welding procedure qualification record (ISO).
- PSI
- Pre-shipment inspection.
- PWHT
- Post weld heat treatment.
- Punch list
- List of open items to be completed or corrected before acceptance.
- Second-party audit
- Audit of a supplier by or on behalf of the customer.
- SPC
- Statistical process control.
- SQE
- Supplier quality engineer.
- TQ
- Technical query.
- Witness point
- ITP point notified to the inspector, who may attend; work may proceed if they do not.
- WPS
- Welding procedure specification.
Published 2026-11-08 · QUALITAS TR technical team