Mrs. Chantarat Vorasapavit, Director of Bureau of Laboratory Accreditation, Department of Science Service (BLA-DSS) came opening a training course titled “Requirements for ISO 33405 : 2024 Reference materials - Approaches for characterization and assessment of homogeneity and stability” at Analytical Chemistry Building on 12 September 2024. As ISO 33405 : 2024 has been modified based on ISO Guide 35, the course was promising in a sense of BLA-affiliated assessors, LACs, TSCs and other relevant stakeholders working related to assess a suitability of a statistical set used for RMPs enabled to update according to ISO 17034. There had been more than 40 guests attending the seminar.