Unit of competency Outline

Date retreived
23/07/2026 1:04 PM AWST

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Analyse measurements and estimate uncertainties

Analyse measurements and estimate uncertainties

Unit of competency
National Code
MSL925002
State Code
AWO55
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
01/03/2016
View on TGA
State Implementation and Classification
Approved Date
16/08/2016
Field of Education
010103 - Statistics
Original Release Date
16/08/2016
Nominal Hours
50
Description
This unit of competency covers the ability to use statistical analysis to estimate and report measurement uncertainty in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (or its replacement Standard). Personnel are required to review their estimates of measurement uncertainty to assist with making decisions on the fitness for purpose of the measurements.This unit of competency is applicable to laboratory personnel who work in calibration and testing facilities, process and interpret data and are required to determine uncertainties using standard methods. The rigour required in estimating uncertainty will depend on the required accuracy of the particular calibration, test or measurement. While no specific licensing or certification requirements apply to this unit at the time of publication, laboratory operations are governed by relevant legislation, regulations and/or external accreditation requirements. Local requirements should be checked.
Notes
Elements and Performance Criteria
1 Identify the measured quantity and the uncertainty components
  • 1.1 Specify an equation for the measurement
  • 1.2 List uncertainty components that are associated with each input in the equation
2 Determine the size of each uncertainty component
  • 2.1 Calculate the standard deviations and standard deviation of the mean from the measurement results
  • 2.2 Use calibration reports, manufacturer's specifications, quality control and validation data, and experimental data to collect other available information on the uncertainty components
3 Reduce each uncertainty component to a standard uncertainty
  • 3.1 Allocate an appropriate distribution for each uncertainty component
  • 3.2 Calculate the standard uncertainties
4 Calculate an expanded uncertainty to the required confidence level
  • 4.1 Calculate the sensitivity coefficient for each uncertainty component
  • 4.2 Calculate a combined standard uncertainty
  • 4.3 Determine an appropriate coverage factor based on the degrees of freedom associated with each uncertainty component
  • 4.4 Calculate the expanded uncertainty
5 Report the expanded uncertainty
  • 5.1 Report the result and uncertainty to an appropriate number of significant figures
  • 5.2 Report the confidence level and coverage factor
  • 5.3 Determine the appropriateness of the size of the expanded uncertainty relative to the tolerance or required accuracy of the test
  • 5.4 Determine the fitness for purpose of the expanded uncertainty relative to the use of the measurement result
No information
No information
Replaces
State Code National Code Title Type
WA674 MSL925002A Analyse measurements and estimate uncertainties Unit of competency
Replaced By
State Code National Code Title Type
OAC73 MSL925003 Determine measurements of uncertainty Unit of competency