Verification and Validiction

Are you confused?

You are in good company: so are many others. ISO 9000 (the bit not read by many) defines:

Verification:
confirmation, through the provision of objective evidence, that specified requirements have been fulfilled

Validation:
confirmation, through the provision of objective evidence, that the requirements for a specific intended use or application have been fulfilled

Teasing apart these definitions, ‘Validation’ replaces ‘specified requirements in Verification’ with ‘the requirements for a specific intended use or application’.

But surely ‘the requirements for a specific intended use or application’ are ‘specified requirements!

Should this lead to even more confusion, then try:

Verification:
checking that a product, a process, a design, meets the stated specification. Some examples of verification: an internal drawing; chemical composition of an alloy; mechanical properties of a plastic; dimensions of a product; ‘sensitivity’ to ISO 10993-XX

Validation:
doing the tests on a product or process to show it produces the results it is intended to produce