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Methods covered by the Scope of Accreditation

When selecting methods to be included in their Scope of Accreditation, facilities have a choice of:

  • Standard methods, those methods published by a standards writing body such as Standards Australia.
  • Peer reviewed methods published by bodies such as APHA or AOAC.
  • In-house methods documented and validated by the facility.  These can either be standard or peer reviewed methods which have been varied such that the validation data no longer applies: or, original methods created by the facility to meet a specific circumstance.

Regardless of the source of a method it is a requirement of accreditation that the method listed in the facility’s Scope is followed in full because the accreditation has been granted for the full method.  Not following the method as written and in full constitutes a variation and is subject to review as per Clause 5.4.4 on non-standard methods from ISO/IEC 17025.

Where concerns exist with the content of a test method NATA encourages those concerned to take this up with the body responsible for publishing the method.  Variations made to standard methods may be included on the Scope of Accreditation on a case by case basis where these are substantiated by method validation that supports the purpose of the test.

Any enquiries should be directed to This email address is being protected from spambots. You need JavaScript enabled to view it. , Sector Manager Life Sciences by This email address is being protected from spambots. You need JavaScript enabled to view it.  or phone 1800 621 666.