If you have been asked for "ISO 17025 certification", the person asking almost certainly means NATA accreditation. It is worth getting this right before you spend money, because the two things are procured differently, assessed differently, and issued by different kinds of body.

Nathan ISO Consulting works with Australian testing and calibration laboratories preparing for initial NATA accreditation, extending an existing scope, or recovering from a difficult assessment. We build the quality system, do the technical work behind measurement uncertainty and method validation, and sit with your team through assessment.

Your scope of accreditation is the product

This is the part laboratories underestimate. NATA does not accredit you in general. It accredits you for specified tests or calibrations, using specified methods, within specified ranges, at specified sites. That scope is published, and your customers can read it.

Everything downstream follows from it. Get the scope too narrow and you will be back applying for an extension within a year. Get it too wide and you are validating methods you do not sell and maintaining equipment you do not need. Write it imprecisely and you end up with a scope that technically excludes the work your largest client sends you.

We spend real time on scope definition before anything else starts. It is the cheapest hour in the whole project and the one most consultants skip.

The five technical areas NATA will test hardest

1. Measurement uncertainty

Every accredited laboratory must be able to evaluate and, where relevant, report measurement uncertainty for the work in its scope. Assessors do not accept an uncertainty budget that appeared from a spreadsheet nobody can explain. They want the contributing components identified, the method documented, and someone in the laboratory able to walk through it.

2. Metrological traceability

Results must be traceable to the International System of Units, ordinarily through calibrations delivered by an accredited calibration laboratory or by a national metrology institute. In Australia that chain commonly runs through the National Measurement Institute. Gaps in the traceability chain are among the most common findings raised.

3. Method validation and verification

Standard methods used within their stated scope need verification that your laboratory can perform them competently. Non-standard, laboratory-developed or modified methods need full validation. The distinction matters because the evidence burden is very different, and laboratories frequently misclassify their own methods in the direction that requires less work.

4. Proficiency testing and interlaboratory comparison

NATA expects participation in proficiency testing appropriate to your scope, with results evaluated and acted on. A PT result outside acceptance limits is not itself a problem. Having no documented investigation of it is.

5. Reporting, including decision rules

Where you make statements of conformity, the 2017 edition requires you to document the decision rule applied and to communicate it. Reports must be unambiguous about what is covered by accreditation and what is not, which is exactly where NATA's application criteria have been tightening in recent years.

Where Australian law and regulation require accredited testing

NATA accreditation is voluntary in the abstract. In practice a great deal of Australian testing is only useful if it is accredited, because the recipient will not accept it otherwise.

NATA also issues discipline-specific application documents that sit alongside ISO/IEC 17025 and are updated periodically. We track the ones applying to your fields, because a criteria change you did not notice becomes a finding at your next assessment.

The road to accreditation

NATA assessment is a longer road than management system certification, and the timeline below reflects that honestly.

How Nathan ISO Consulting assists

Laboratory work needs two different kinds of help at once, and most consultancies only offer one. A quality system consultant who cannot discuss an uncertainty budget is of limited use to a calibration laboratory. A metrologist who has never written a management review agenda is of limited use at assessment.

What we do differently

We write the scope before we write anything else

A surprising number of laboratory projects begin with documentation and arrive at scope late. That sequence produces systems that cover the wrong work. We start where the money is.

We build uncertainty budgets with your staff, not for them

An uncertainty budget your technical officer cannot explain will fail at assessment regardless of how well it is calculated. We build them in the laboratory, with the people who will have to defend them.

We classify your methods honestly

Calling a modified method a standard method reduces work now and creates a major finding later. We will tell you when validation is required even when you would rather it was not.

We track NATA criteria changes for your fields

The application documents that sit alongside the standard are updated periodically, and reporting requirements in particular have been tightening. A criteria change you did not notice becomes a finding at your next surveillance.

We know where our expertise ends

If your project needs specialist metrology, a particular analytical technique, or forensic discipline experience beyond our team, we will say so and help you find it rather than improvising.

Laboratories we support, and where

Australian laboratories cluster by industry rather than by population, so our coverage follows the work.

Questions laboratory managers ask us

Is it ISO 17025 certification or NATA accreditation?

Accreditation. In Australia laboratories are accredited against ISO/IEC 17025:2017 by NATA, not certified by a management system certification body. The word certification is widely used informally, but a certificate from a certification body will not let you issue NATA-endorsed reports.

Can a JAS-ANZ accredited certification body accredit our laboratory?

No. JAS-ANZ accredits certification bodies for management system standards. Laboratory accreditation in Australia is NATA's function. If a provider offers you an ISO 17025 certificate quickly and cheaply, that is a strong signal to stop and check.

How long does NATA accreditation take?

Six to twelve months is realistic for initial accreditation, depending on scope breadth and how much technical work is already in place. The technical elements, particularly uncertainty budgets and method validation, are the long pole rather than the documentation.

Do we need to hold ISO 9001 as well?

No. ISO/IEC 17025 contains its own management system requirements, and clause 8 offers two options for meeting them. Laboratories inside larger certified organisations often align the two, but ISO 9001 is not a prerequisite for accreditation.

What happens if we get a proficiency testing result outside acceptance limits?

On its own, not much. Assessors expect occasional outliers. What they look for is a documented investigation, a determination of cause, and evidence of action taken. An unexplained outlier with no investigation record is the finding, not the outlier itself.

Can we add tests to our scope later?

Yes. Scope extensions are a normal part of laboratory life and can usually be handled without disturbing existing accreditation. Planning likely extensions during initial scope definition makes them considerably cheaper when the time comes.

Which states and regions do you cover?

All of them. Our laboratory work spans Perth and the Western Australian goldfields and Pilbara, Sydney, Melbourne, Brisbane, Adelaide, Canberra, Hobart, Darwin, and industrial regional centres including Gladstone, Townsville, Newcastle and Mount Isa.

Our last assessment went badly. Can you help us recover?

Yes, and it is a meaningful part of our work. Recovery projects start with an honest read of the assessment report to separate genuine technical deficiencies from documentation problems, because the two need very different responses and timelines.

Talk to us about your scope

Send us your current or intended scope of accreditation and a list of your methods. That tells us more in ten minutes than a discovery call does in an hour.