Choosing the right lab – one size doesn’t fit all

Member News July 7, 2025
Choosing the right lab – one size doesn’t fit all
NATA team

At first glance, all accredited laboratories might look alike. They have certificates on the wall, impressive credentials, and claims of technical expertise. So why does choosing the right lab sometimes feel like a guessing game? 

The reality is more complex. Not all accredited labs are created equal – even if they operate in the same general area. Behind those certificates lies a detailed landscape of specialisations, specific test methods, and carefully defined scopes of accreditation. 

Choosing the wrong lab – even one that’s accredited – can lead to unexpected delays, increased costs, and compliance headaches. That’s why understanding  your specific testing needs is critical in order to choose the right accredited laboratory. 

Accreditation sets the standard – but scope defines the limits 

While NATA accreditation confirms a laboratory meets rigorous technical and quality standards, it doesn’t mean every accredited laboratory can perform the tests your require. 

Each laboratory’s accreditation is tied to a detailed scope of accreditation – a defined list of specific activities the accreditation covers.  

Why does this matter? 

Because laboratories offering similar services might be accredited for different tests or specialised techniques. For example, one environmental laboratory may be accredited for chemical contaminants in water using a specific method, another laboratory offering the same service may be accredited using another method. 

Engaging a laboratory that can perform a test but isn’t accredited for that specific method – means the results might not be accepted by the end user.

Why getting the right scope matters: How mismatches happen despite communication 

You might wonder: “Don’t clients usually check with labatories before submitting samples?” Often, yes – but scope mismatches still happen, and they can be costly. 

Here’s why: 

  • Assumptions based on accreditation alone 
    It’s easy to assume that if a lab is accredited, it’s suitable for any test in that general area. But accreditation is specific to certain tests and methods. Without checking the scope of accreditation carefully, you might rely on a laboratory accredited for a related – but not the exact – test you need. 
  • Multiple hands in the process 
    Projects often involve consultants, contractors, or procurement officers who may not share the same technical understanding. Sometimes, the crucial conversation about specific testing needs gets lost, or samples are sent to “the usual laboratory” without confirming accreditation details. 
  • Changing or complex requirements 
    Testing needs can evolve during a project, and a laboratory that was suitable initially might no longer cover the testing needs as the project progresses.  Scoping the testing needs of the project throughout its duration is necessary in order to select the correct laboratory(ies). 
  • Pressure and Time Constraints 
    In fast-paced environments, teams might rely on established relationships rather than revalidating a labortaory’s scope of accreditation every time. 

Because of these factors, it’s vital to check a laboratory’s scope of accreditation – not just their accreditation status – every time you require testing. This small step can save time, money, and stress down the line. 

How to choose the right accredited lab every time 

To avoid common pitfalls, follow these straightforward steps to select the right laboratory for your specific testing needs: 

  1. Review the laboratory’s scope of accreditation 
    Start by checking the laboratory’s detailed scope on the NATA website. Make sure your required tests are included – don’t assume broad categories cover your specific needs.  If unsure then contact the laboratory directly and discuss your needs. 
  2. Ask questions early 
    Contact the laboratory before submitting samples. Confirm they’re accredited for the exact methods and standards relevant to your project. A good laboratory welcomes these questions and provides clarity. 
  3. Consider industry experience 
    Laboratories familiar with your sector better understand regulatory and client expectations, making testing smoother and more reliable. 
  4. Communicate your project requirements clearly 
    Provide as much information as possible – sample types, relevant standards, turnaround times, and reporting needs – so the laboratory can meet all your requirements. 
  5. Reconfirm for each new project 
    Even if you’ve used a laboratory before, double-check their scope of accreditation if your testing needs change. Accreditation scopes and project requirements can evolve. 

Taking these steps helps avoid delays, reduces compliance risks, and ensures your results are accepted with confidence. 

Final thoughts 

Choosing an accredited laboratory is essential – but choosing the right accredited laboratory makes all the difference. Understanding and verifying a laboratory’s specific scope ensures your project runs smoothly, results are accepted, and risks are minimised. A little due diligence up front goes a long way towards peace of mind down the track.