DS/ISO/TS 21749:2005

Measurement and uncertainty for metrological applications - Repeated measurements and nested experiments


Status:
Current
Type:
Standard
Language:
EN
Price from:
€ 85.86

Scope

This Technical Specification follows the approach taken in the Guide to the expression of the uncertainty of measurement (GUM) and establishes the basic structure for stating and combining components of uncertainty. To this basic structure, it adds a statistical framework using the analysis of variance (ANOVA) for estimating individual components, particularly those classified as Type A evaluations of uncertainty, i.e. based on the use of statistical methods. A short description of Type B evaluations of uncertainty (non-statistical) is included for completeness.
This Technical Specification covers experimental situations where the components of uncertainty can be estimated from statistical analysis of repeated measurements, instruments, test items or check standards.
It provides methods for obtaining uncertainties from single-, two- and three-level nested designs only. More
complicated experimental situations where, for example, there is interaction between operator effects and instrument effects or a cross effect, are not covered.

Number of pages: 48

Published: 2005-09-29

Date of approval: 2005-08-09

International relationships: ISO/TS 21749:2005 IDT

ICS: 17.020 - Metrology and measurement in general

Item number: M206079


Committees

Committee

  • ISO/TC 69/SC 6/WG 7

Danish committee

DS/S-238