ACLASS Guidance Documents
PT/ILC Requirements
ACLASS Guidance on
Proficiency Testing/Inter-Laboratory Comparison PT/ILC
Requirements
Intended to give ACLASS customers, assessors, and experts the
necessary understanding of proficiency testing/inter-laboratory
comparisons to achieve and/or maintain accreditation to ISO/IEC
17025.
Surveillance and Reassessments
ACLASS
Guidance on Surveillance and Reassessments
Traceability
ACLASS Guidance on
Traceability
Guidance on traceability requirements for ACLASS-accredited labs,
which are required to demonstrate traceability for their reference
standards and reference materials (in most cases includes
measurement uncertainty).
Uncertainty for Testing Labs
ACLASS
Guidance on Uncertainty for Testing Laboratories
Testing customers are required to demonstrate traceability and
measurement uncertainty as defined in this document.
Classification and Assessment of Multi-Site Labs
ACLASS Guidance for Classification and Assessment of
Multi-Site Laboratories
Scopes of Accreditation
ACLASS
Guidance on Scopes of Accreditation
Recommendations and guidance are intended to assist ACLASS
assessors and accredited and applicant labs in drafting scopes of
accreditation, and to allow adherence to both ILAC guidance
documents and ACLASS requirements, while helping standardize
formats across the range of potential accredited tests and
calibrations in the sphere of ISO/IEC 17025-accredited
operations.
Measurement Uncertainty
ACLASS
Guidance on Measurement Uncertainty
Intended for ACLASS-accredited labs to help clearly distinguish
three different terms and types of uncertainty in the ISO/IEC 17025
and ANSI/NCSL Z-540 systems (measurement uncertainty, best
measurement capability, and TUR uncertainty). Accredited labs are
required to demonstrate the measurement uncertainty for each of
their accredited calibration and/or testing procedures.
Symbol Usage and Use of ILAC Combined Laboratory MRA Mark
ACLASS-FQS Guidance on Symbol Usage and Use of
ILAC Combined Laboratory MRA Mark
Uncertainty for Dimensional and Mechanical Calibrations
ACLASS Uncertainty Guidance for Dimensional and Mechanical
Calibrations
Provides examples of uncertainty budgets for hand tools, hand
gages, and scales and balances to help provide a better
understanding of preparing an uncertainty budget. Not intended to
encompass all the statistical treatments required for many
uncertainty determinations. Designed to assist calculations in many
of the simplest situations, not requiring statistical use of
degrees of freedom for example.
Uncertainty Calculator -
zip file.
RMP Accreditation
ACLASS
Guidance on ISO Guide 34 Reference Material Producer
Accreditation
Inspection Body Accreditation
ACLASS
Guidance on Inspection Body Accreditation