ISO 19983:2022

Overview

ISO 19983:2022 - Rubber - Determination of precision of test methods - provides international guidance and requirements for estimating the precision of rubber test methods using interlaboratory test programmes (ITPs). The standard prescribes two routes for precision estimation:

• Method A: based on ISO 5725 (all parts) to calculate repeatability, day-to-day repeatability, and reproducibility.
• Method B: based on ASTM D4483 to calculate day-to-day repeatability and reproducibility.

ISO 19983:2022 is intended for established rubber test methods and supports consistent, transparent precision assessment across laboratories and industries.

Key topics and technical requirements

• Interlaboratory test programme (ITP) design: planning, selection of materials (type 1/type 2), and volunteer laboratories experienced with the method.
• Precision metrics:
  • Repeatability - same lab, same operator, short intervals (typically within a day).
  • Day-to-day repeatability - same lab/operator/equipment across days (commonly 1–7 days).
  • Reproducibility - different laboratories, operators and equipment.
• Procedures and calculations:
  • Detailed methodologies for Method A (ISO 5725) and Method B (ASTM D4483), with normative annexes for calculations.
  • Guidance on the number of replicates, variance components, pooled standard deviations, and relative precision values.
• Outlier detection and treatment: expanded guidance in clauses 6.8–6.9 and an informative Annex F example for Method B.
• Reporting requirements: required content of precision reports to ensure transparent dissemination of results.
• Normative references and symbols: cross-references to ISO 5725 parts, ISO 3534, and ASTM D4483; symbols and terminology for statistical analysis.

Practical applications and intended users

ISO 19983:2022 is used to:

• Establish or validate the precision of standardized rubber test methods.
• Support test method development, standardization, and revisions by technical committees.
• Provide laboratory accreditation bodies and quality managers with accepted statistical precision estimates for method performance.
• Inform manufacturers, R&D teams, and product conformity assessment groups when interpreting test variability and setting acceptance criteria.

Users: test laboratories, standards developers (ISO/TC 45 and others), rubber and elastomer manufacturers, quality and metrology professionals, and accreditation bodies.

Related standards and resources

• ISO 5725 (all parts) - Accuracy (trueness and precision) of measurement methods and results.
• ASTM D4483 - Practice for determining precision in the rubber and carbon black industries.
• ISO 3534-1 / ISO 3534-2 - Statistical vocabulary and symbols.

Keywords: ISO 19983:2022, rubber test methods, precision, repeatability, reproducibility, day-to-day repeatability, interlaboratory test programme, ISO 5725, ASTM D4483, outlier treatment, precision estimation.