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Instrument calibration.

Harvey Padden1

  • 1Bios International Corporation of Butler, N.J., USA. padh@biosint.com

Occupational Health & Safety (Waco, Tex.)
|June 1, 2002
PubMed
Summary
This summary is machine-generated.

Measurement uncertainty requires accounting for all error sources from the National Institute of Standards and Technology (NIST) to the final lab result. Rigorous vendor analysis and adherence to standards like ISO 17025 ensure reliable data.

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Area of Science:

  • Metrology and Measurement Science
  • Quality Management Systems

Background:

  • Accurate laboratory results depend on a comprehensive understanding and control of measurement uncertainty.
  • External vendors play a crucial role in the measurement process, necessitating their rigorous evaluation.

Purpose of the Study:

  • To emphasize the critical need for encompassing all error sources in measurement uncertainty calculations.
  • To highlight the importance of verifying vendor compliance with uncertainty analyses and performance standards.

Main Methods:

  • Review of measurement uncertainty principles, emphasizing end-to-end error accounting.
  • Assessment of vendor responsibilities in performing and adhering to uncertainty analyses.
  • Consideration of ISO 9001-2000 and ISO/IEC 17025 accreditations as indicators of quality assurance.

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Main Results:

  • Measurement uncertainty must integrate contributions from the initial standard (e.g., NIST) to the final reported value.
  • Proactive verification of vendor-supplied uncertainty data and performance is essential for laboratory integrity.
  • Accreditations like ISO 17025 provide a framework for assuring the reliability of measurement processes and vendor contributions.

Conclusions:

  • Comprehensive measurement uncertainty evaluation is paramount for reliable scientific and industrial outcomes.
  • Laboratories must actively manage and validate vendor contributions to ensure the integrity of measurement uncertainty.
  • Adherence to international standards and rigorous vendor oversight are key to achieving and maintaining measurement confidence.