Hong Kong - November 2016
PTB-APLAC Training Course on Statistical Methods for Proficiency Testing
12-14 November 2014
HKAS hosted an APLAC-PTB training course on “Statistical methods for proficiency testing” on 12-14 November 2014 in Hong Kong. The training was organized by APLAC and sponsored by PTB (Physikalisch-Technische Bundesanstalt) of Germany, with Mr Dan Tholen, the Convener of ISO/TC69/SC6/WG 9 (working group for revision of ISO 13528), and Dr Kunchit Judrason, Assistant Professor of the Institute of Nutrition at Mahidol University of Thailand, as the trainers. A total of 16 participants from proficiency testing providers and accreditation bodies in the Asia-Pacific region attended the training course. The training course focused on the revision of ISO 13528: Statistical methods for use in proficiency testing by interlaboratory comparison. The revised standard was expected to be published in 2015. The course was a combination of lectures, exercises and discussions. The training course started with a welcoming remark from the course coordinator, Mr Wong Wang-wah, Executive Administrator, HKAS. Mr Dan Tholen began by giving an introduction on the top ten changes in the revision of the standard, with emphasis on the linkages between the statistical methods chosen and the objectives of proficiency testing schemes. He then explained in detail the contents of the revised standard, covering the general principles and guidelines for statistical design of proficiency testing schemes. Dr Judprasong also guided the participants, step by step, to implement common robust statistical technique using Excel spreadsheets following the examples in the revised standard. In the following days, the trainers continued to go through the revised standard, deliberating on topics such as techniques for assessment of homogeneity and stability, procedures for determination of assigned values, review of robust statistical methods, procedures for calculation of performance statistics, review of graphical methods and guidelines for qualitative techniques. Exercises on selected topics were also conducted. At the end of the training, Mr Tholen further demonstrated the concepts in the revise standard using real APLAC proficiency testing programmes as examples. Most participants found the training very fruitful and practical.