What NABL accreditation confirms
The National Accreditation Board for Testing and Calibration Laboratories (NABL) accredits laboratories against ISO/IEC 17025, the international standard for the competence of testing and calibration labs. Accreditation is formal recognition that your lab's technical results are reliable and generated under a properly controlled quality system — not just a certificate to hang on the wall.
The two pillars of ISO/IEC 17025
ISO/IEC 17025 requirements fall into two broad categories: management requirements (your quality management system — document control, internal audits, management review, corrective actions) and technical requirements (staff competence, equipment, method validation, measurement traceability, and environmental conditions affecting your tests).
Labs that focus only on the technical side and neglect the management system — or vice versa — typically run into gaps during assessment.
Common gaps we see before assessment
Method validation records that don't fully demonstrate accuracy and precision for your specific scope.
Calibration traceability chains that aren't documented back to a national or international standard.
Internal audits and management reviews that are done as a formality rather than genuinely surfacing and closing gaps.
Staff competence records that don't clearly map each analyst to the specific tests they're authorised to perform.
How the accreditation process typically flows
It usually starts with a gap assessment against ISO/IEC 17025 for your specific scope of testing or calibration, followed by building or strengthening your quality manual and SOPs, running an internal audit and management review to surface and fix issues, and then going through NABL's formal assessment. Pre-assessment readiness review — essentially a dry run — catches most issues before the real assessment does.
Maintaining accreditation after you get it
Accreditation isn't a one-time event. NABL requires ongoing surveillance, periodic reassessment, and maintenance of your quality system as your scope, equipment, or staff change. Labs that treat their quality system as a living process — not paperwork done once for the assessor — tend to sail through surveillance visits.
FAQs
How long does NABL accreditation typically take?
It depends heavily on how developed your lab's quality system already is. A lab starting from a strong technical base but weak documentation moves faster than one needing to build both from scratch.
Can a new lab apply for NABL accreditation directly?
Yes, but the lab needs to have been operating with its quality system and test methods in active use for a period before assessment, since NABL needs to see the system functioning with real records, not just written procedures.
This article is general information about BIS/NABL compliance, not legal or regulatory advice. Requirements change — confirm current applicability for your specific product before acting.
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NABL Accreditation
ISO/IEC 17025 accreditation for testing & calibration labs.