According to VIM3 [1], a method is: a “generic description of a logical organization of operations used in a measurement” (Entry 2.5) (e.g. standard addition method or gas-chromatography) …therefore, methods cannot be validated because are too general. The detailed description of the analytical methodology, subject to validation, is a procedure: Measurement procedure (Entry 2.6): “detailed Read more about Procedure (not method…) validation![…]