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The ICH M10 guideline on bioanalytical method validation and sample analysis is being adopted since 2023. However, and inevitably, some paragraphs or requirements remain ambiguous and are open for different interpretations. In support of a harmonized interpretation by the industry and health authorities, the European Bioanalysis Forum organized a workshop on 14 November 2023 in Barcelona, Spain, to discuss unclear and/or ambiguous paragraphs which were identified by the European Bioanalysis Forum community and delegates of the workshop prior to the workshop. This manuscript reports back from the workshop with recommendations and aims at continuing an open scientific discussion within the industry and with regulators in support of a science-driven guideline for the bioanalytical community and in line with the ICH mission - that is, achieve greater harmonization worldwide to ensure that safe, effective and high-quality medicines are developed and registered in the most resource-efficient manner.

In this report, the European Bioanalysis Forum shares the proposals for harmonized implementation of the ICH M10 guideline on bioanalytical method validation and study sample analysis from the ICH M10 workshop. The focus of the discussions was to understand new, changed or still ambiguous regulatory expectations in the guideline, as identified in feedback from the pre-workshop surveys or during the workshop. The proposals from the workshop aim at stimulating and helping a harmonized implementation of the guideline, and using our community as a sounding board during and after implementation to highlight areas of misalignment and to create a platform for continued sharing with the regulatory authorities in an effort to contribute to industry and regulators developing similar interpretations on guideline expectations.