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IWG MU (Measurement Uncertainties): Terms of Reference
Document GRBP-74-12
31 August 2021

This revised document intended to present to amend 117 the timetable for the work related to Regulation No. 117 has been shifted with approximately 12 months for this part.
The aim of the IWG is to propose harmonized measures for evaluating systematic errors and random errors to improve the test procedures to reduce measurement uncertainties

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Previous Documents, Discussions, and Outcomes
3. | UN Regulation No. 51 (Noise of M and N categories of vehicles)

4. The expert from Norway, in his capacity of Chair of the Informal Working Group on Measurement Uncertainties (IWG MU), reported on the progress of IWG MU (GRBP-74-20) and proposed to update its Terms of Reference (GRBP-74-12). GRBP adopted the revised Terms of Reference, as laid down in Annex II.

7. (e) | UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)
3. | UN Regulation No. 51 (Noise of M and N categories of vehicles)

7. The expert from Norway, in his capacity of Chair of the Informal Working Group on Measurement Uncertainties (IWG MU), reported on the progress of IWG MU (GRBP-73-14-Rev.1) and proposed to update its Terms of Reference (GRBP-73-16). GRBP adopted the revised Terms of Reference, as laid down in Annex II of the session report.

Related and Previous Documents
GRBP-73-16
Relates to UN R51 | UN R117 |