Completed events

Eurachem Workshop - Uncertainty from sampling and analysis for accredited laboratories

A Eurachem International Workshop in conjunction with Eurolab and CITAC.   EURACHEM Logo 30th 235x80

Venue and date

The workshop was held on 19-20 November 2019. The workshop was kindly hosted by BAM at BAM headquarters, Unter den Eichen, Berlin, Germany with support from EUROLAB-Deutschland. Approximately 130 participants attended, from 37 countries. The meeting included invited presentations, contributed oral presentations, and discussion and poster sessions. Available presentation material can be found via the programme links below.

Workshop information

Date: 19-20 November 2019
Venue: BAM headquarters, Unter den Eichen, Berlin, Germany
First circular: Download the first circular (pdf, 190kb)
Second circular Download the second circular (pdf, 2.3 Mb)
Social media Follow #ECMU2019 and @EurachemEvents for updates

Workshop programme

Workshop programme (PDF, 1.2 Mb)

Full scientific programme and Abstracts

Abstracts, with programme and list of posters (PDF, 1.6 Mb) (Last updated 2019-11-25)


Aims and topics


The workshop considered measurement uncertainty evaluation for sampling and analysis in the context of ISO/IEC 17025:2017. The workshop was intended for laboratory managers and staff concerned with

  • designing and implementing sampling protocols to ensure acceptable levels of uncertainty in results and conclusions
  • developing and maintaining field or laboratory procedures for measurement uncertainty evaluation and reporting to meet the requirements of ISO/IEC 17025:2017
  • reporting measurement uncertainty in conformity assessment decisions under ISO/IEC 17025:2017


The workshop discussed

  • New provisions in the recently revised Eurachem Guide “Measurement uncertainty arising from sampling”
  • Improved methods for evaluating uncertainty from sampling
  • Current approaches to the evaluation of measurement uncertainty in analysis
  • Limitations in uncertainty evaluation under the ISO Guide to the Expression of Uncertainty in Measurement (GUM)
  • New approaches for expressing measurement uncertainty – large uncertainties and asymmetry
  • Recent developments in uncertainty evaluation using validation and QC data
  • Measurement uncertainty, conformity assessment and decision rules in ISO/IEC 17025:2017
  • Measurement uncertainty and regulation
  • Software for measurement uncertainty evaluation
  • Planning and accreditation of sampling under ISO/IEC 17025:2017
  • New directions for international guidance – the future of the GUM


Programme and presentations

Quick links

DAY 1 - Tuesday 19th November 2019
Introducing uncertainty, and uncertainty from sampling

Plenary programme

Welcome and Opening Remarks
Introducing measurement uncertainty
 New features in the Eurachem UfS Guide 2nd Edition
Parallel discussion sessions (see below)
  • Session 1: Applications of Uncertainty from Sampling
  • Session 2: Methods for evaluating Uncertainty from Sampling

(Session summaries below)

Accreditation perspectives
Next steps


Parallel sessions - Day 1

Session 1: Applications
Chair: Ariadne Argyraki 

 Session 1 Summary (A Argyraki) [77 kB]

Session 2: Methods
Chair: S. Ellison

Session 2 summary (S Ellison) [75 kB]


DAY 2 - Tuesday 19th November 2019
Evaluation and use of measurement uncertainty

Plenary programme

Approaches to measurement uncertainty evaluation
Evaluating uncertainty from validation and QC data
Focussing on large uncertainties
Conformity assessment
Parallel discussion sessions (see below)
  • Session 1: Conformity assessment
  • Session 2: Handling high uncertainty, asymmetry and bias
  • Session 3: Software for MU evaluation
International guidance

Workshop summary and closing discussion
Mike Ramsey and Steve Ellison


Parallel sessions - Day 2

Session 1: Conformity assessment
Chair: W. Wegscheider

 Session 1 summary (W Wegscheider) [180 kB]

Session 2: Handling high uncertainty, asymmetry and bias
Chair: S Richter*, A. Williams     [Pending upload]

Session 2 summary (S Richter)

Session 3: Software for MU evaluation
Chair: B. Magnusson

Session 3 summary (B Magnusson) [83 kB]



Posters are listed in order of author for correspondence.