A test report is only as credible as the laboratory that issued it. Export buyers, regulators and certification bodies increasingly accept results only from laboratories accredited to ISO/IEC 17025. In Pakistan, that accreditation is granted by the Pakistan National Accreditation Council (PNAC). Whether you run an in-house QC lab at a factory, a commercial testing lab or a calibration service, this guide explains what ISO/IEC 17025 requires, how the PNAC process works and how to prepare without stalling for months.
Quick answer: ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. In Pakistan, labs are accredited by PNAC, which operates under the Ministry of Science and Technology and is a signatory to the international ILAC and APAC mutual recognition arrangements. To get accredited, a lab implements a quality management system, validates its methods, establishes measurement traceability and uncertainty, takes part in proficiency testing, then applies to PNAC for document review and on-site assessment for a defined scope of tests.
Accreditation is not the same as ISO certification
ISO 9001 certification says your management system is in place. ISO/IEC 17025 accreditation goes further: an expert assessor confirms that your laboratory is technically competent to produce valid results for specific tests or calibrations. Accreditation is always tied to a defined scope: named tests, methods, matrices and ranges. A lab accredited for moisture in wheat is not automatically accredited for aflatoxin in the same sample. If you are comparing claims made by labs or certification bodies, our guide on checking whether an ISO certificate is valid explains what to look for.
Who needs ISO/IEC 17025 accreditation?
- Commercial testing labs serving food, water, textile, construction materials and pharmaceutical clients
- Calibration labs for temperature, pressure, mass, dimension, electrical and torque instruments
- Factory QC labs whose results are used for export certificates or buyer approvals
- Labs whose reports support PSQCA, DRAP, food authority or tender submissions
- University and research labs offering testing services to industry
What ISO/IEC 17025 requires
| Area | What assessors look for |
|---|---|
| Impartiality and confidentiality | Policies and evidence that commercial or internal pressure cannot influence results |
| Personnel | Qualified staff, training records, authorisation for each test and ongoing competence monitoring |
| Facilities and environment | Controlled conditions where they affect results, such as temperature and humidity |
| Equipment | Calibration, intermediate checks, maintenance and records for every instrument |
| Metrological traceability | Calibrations traceable to SI units through accredited providers |
| Methods | Standard methods verified, in-house methods validated, measurement uncertainty estimated |
| Quality of results | Proficiency testing, internal QC checks, control charts and replicate testing |
| Management system | Document control, complaints, corrective actions, internal audits and management review |
Traceability trips up many Pakistani labs. Our article on calibration and traceability explains how to build an unbroken chain back to national standards.
The PNAC accreditation process, step by step
- Gap analysis. Compare current practice against every clause of ISO/IEC 17025 and the PNAC requirements, and define the scope you want accredited.
- Build the system. Write the quality manual, procedures and records; validate or verify methods; estimate measurement uncertainty; calibrate equipment through accredited providers.
- Operate and collect evidence. Run the system for a period, take part in proficiency testing or inter-laboratory comparisons, conduct an internal audit and hold a management review.
- Apply to PNAC. Submit the application form, quality documents, proposed scope and fees.
- Document review and assessment. PNAC reviews your documents and appoints lead and technical assessors who visit the lab, witness tests and examine records.
- Close non-conformities. Submit corrective actions with evidence within the time allowed.
- Accreditation decision. PNAC issues the accreditation certificate with the approved scope.
- Surveillance and reassessment. Regular surveillance visits and periodic reassessment keep the accreditation valid; scope can be extended over time.
How long does accreditation take?
For a lab starting from a basic quality system, preparation is usually the longest phase because you need several months of operating records, proficiency testing results and validation data before applying. Labs that already follow good practice and keep complete records move much faster. Starting with a narrow scope of your most requested tests and extending later is often the quickest route.
Practical tips for a smoother assessment
- Start with a focused scope rather than every test you perform
- Plan proficiency testing early, since schemes run on fixed rounds
- Calibrate critical equipment through accredited calibration providers and keep certificates on file
- Keep raw data, worksheets and instrument printouts together and traceable to each report
- Train analysts on uncertainty and method validation, not just on running tests
If you are still setting up the laboratory itself, start with our reference on the QC laboratory your product actually needs. Food producers will find accredited testing important for shelf-life studies too.
Frequently asked questions
Who grants ISO 17025 accreditation in Pakistan?
The Pakistan National Accreditation Council (PNAC), under the Ministry of Science and Technology, accredits testing and calibration laboratories to ISO/IEC 17025.
Is PNAC accreditation recognised internationally?
PNAC is a signatory to the ILAC and APAC mutual recognition arrangements, so results from labs it accredits can be accepted by accreditation bodies in other signatory economies.
What is the difference between ISO 9001 and ISO 17025?
ISO 9001 certifies a general quality management system. ISO/IEC 17025 accreditation confirms a laboratory’s technical competence to produce valid results for a defined scope of tests or calibrations.
Do I need proficiency testing before applying?
Yes. Participation in proficiency testing or inter-laboratory comparisons is expected as evidence that your results are reliable, and assessors review the results.
Can a factory in-house lab get ISO 17025 accreditation?
Yes. An in-house QC lab can be accredited for the tests it performs if it meets the standard, including impartiality safeguards from production pressure.
How CEC can help with ISO/IEC 17025
Connect Engineers & Consultants helps laboratories define their scope, write the quality system, validate methods, estimate uncertainty, arrange proficiency testing and prepare for PNAC assessment. See our laboratory compliance services.
Planning to accredit your lab? Share your list of tests and we will propose a realistic scope and timeline.
Accreditation requirements, fees and policies are set by PNAC and may change. Confirm current requirements with PNAC. This guide is general information, not legal or tax advice.
