Skip to main content


What is a verification?


The International Vocabulary of Metrology (VIM 2.44) defines a verification as provision of objective evidence that a given item fulfils specified requirements. EXAMPLE 1. Confirmation that a given reference material as claimed is homogeneous for the quantity value and measurement procedure concerned, down to a measurement portion having a mass of 10 mg. EXAMPLE 2. Confirmation that performance properties or legal requirements of a measuring system are achieved. EXAMPLE 3. Confirmation that a target measurement uncertainty can be met. NOTE 1. When applicable, measurement uncertainty should be taken into consideration. NOTE 2. The item may be, e.g. a process, measurement procedure, procedure, material, compound, or measuring system. NOTE 3. The specified requirements may be, e.g. that a manufacturer's specifications are met. NOTE 4. Verification in legal metrology, as defined in VIML[53], and in conformity assessment in general, pertains to the examination and marking and/or issuing of a verification certificate for a measuring system. NOTE 5. Verification should not be confused with calibration. Not every verification is a validation. NOTE6. Inchemistry, verification of the identity of the entity involved, or of activity, requires a description of the structure or properties of that entity or activity.

Measurement FAQ  

This FAQ contains answers to the questions that you ask most frequently. This list is far from complete. We regularly add new questions and answers.
Please send your questions and suggestions. It will help us to improve our FAQ for all users.

For further information you can access to level 2 of the FAQ by beciming a member of the CFM.


send your question FAQ level 2