Programme > Training Course

Training Course

Title: Statistics in PT - From homogeneity and stability testing to consensus means and proficiency assessment

Dr Michael Koch from Stuttgart University, Germany
Dr Piotr Robouch from Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre European Commission, Belgium.

Day: 18th September, 2009

09:00 – 09:20 - The jungle of standards and guidelines for the statistical treatment of PT data
09:20 – 09:50 - Stability and homogeneity evaluation
09:50 – 10:30 - Practical examples of stability and homogeneity evaluation
10:30 – 11:00 - Coffee break
11:00 – 11:30 - Assigned values and statistical methods for calculation, if consensus mean is used
11:30 – 12:15 - The Algorithm A in detail
12:15 – 14:00 - Lunch break
14:00 – 15:30 - Practical examples
15:30 – 16:00 - Coffee break
16:00 – 16:30 - Scoring procedures in PT and how to determine the standard deviation for proficiency assessment
16:30 – 17:15 - Practical Examples for scoring procedures
17:15 – 17:45 - Final discussion


  ISO/IEC Guide 43-1:1997
Proficiency testing by interlaboratory comparisons -- Part 1: Development and operation of proficiency testing schemes

  ISO 13528:2005
Statistical Methods for use in Proficiency Testing by Interlaboratory comparisons
IUPAC Technical Report 1/2006
The International Harmonized Protocol for the Proficiency Testing of Analytical Chemistry Laboratories (Pure Appl. Chem., Vol. 78, No. 1, pp. 145–196, 2006)

ILAC Guidelines for the Competence of Providers of Proficiency Testing Schemes

  ISO/TS 20612:2007
Water quality --Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories

  ISO/IEC DIS 17043
Conformity assessment -- General requirements for proficiency testing

Important notice: We recommend the participants at the training course to:
  • acquire basic information from the above-mentioned references
  • bring their personal portable computers to carry on practical example sections
The material distributed at the course contains EXCEl-files with macros. As a consequence, we kindly ask all the participants at the training course to:
  • have EXCEL installed on the laptop (OpenOffice does not work!)
  • change the security level for maco virus protection (in EXCEL: Tools\ Options\ Security\ Macro Security\ Security Level, change to “Medium”)
  • test that you set correctly the security level from the previous step using the file MacroTest.xls and be sure that it works properly, otherwise the distributed macros during the training course will not work.