ISO 17025 Uncertainty Management

Online Training

Starting at $349.00

Scope of the Lesson

Communicating about measurements and measurement equipment.

What is a Specification?

  • Why do we need specifications?
  • The use of specifications in measurement and metrology
  • The form(s) taken by specification
  • Some examples of specifications of measuring equipment
  • How to read and interpret specifications
  • The importance of specifications in calibration
  • What it means to be in or out of spec.
  • Practice reading, interpreting, calculating

What is a Tolerance?

  • How are tolerances stated?
  • What is the difference between a tolerance and a specification?
  • Some examples of tolerances of measuring equipment
  • How to read and interpret tolerances
  • The importance of tolerances in calibration
  • What it means to be in or out of tolerance
  • Practice reading, interpreting, calculating

Measurement Uncertainty (this is not a full treatment, just an intro in context)

  • Definitions (in context) of measures of measurement reliability and quality
  • Accuracy
  • Precision
  • Resolution
  • Repeatability and Reproducibility
  • Traceability
  • How do these definitions fit with specifications and tolerances?
  • Special cases: floor specs, % of full scale vs % of reading, ppm, values near zero
  • Calculation of measurement uncertainty – budgets
  • Converting specifications and tolerances to uncertainty
  • Practice calculating

Accreditation: rules relating to specifications and tolerances


  • The 10:1 principle; 4:1, 3:1
  • What did they mean in the past: Definitions in MIL-STD-45662
  • What do they mean now? Definitions in ANSI/NCSL Z-540-1, ISO 10012-1 and ISO/IEC 17025
  • Are they useful? If so, why?
  • Accuracy ratios, tolerance ratios, uncertainty ratios
  • Ratios and traceability
  • Practice calculations

Specifications, Tolerances, and Uncertainty

  • Inspection and test
  • Errors of Type I
  • Errors of Type II
  • Decision rules
  • Definitions
  • Applying them
  • Responsibility (whose)
  • Measurement uncertainty and decision rules

Changes to and Adjustment of Decision Rules

  • Guardbanding
  • Determining conformance to identified metrological specifications and taking measurement uncertainty into account
  • Practice calculations

Estimated completion time is 10 hours.

Product Details

Product Type: Digital

Price: $349.00

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Basic Features

Interactive with over 200 Full-Color Slides N N
Audio to reinforce slides N N
Printable certificate with participant’s name N N
Quizzes to ensure comprehension N N
Certificate not issued without a passing grade N N

Training Method

Internet browser (PC or Mac) N N

Quantity and Price

Duration of Use Unlimited Use, 3 Year Site License Single Use, 30 Day Access
Unlimited use 3 Year Site License Includes:
Unlimited users at one site.
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