Commissioning and qualification (C&Q or sometimes CQV) are two distinct steps of validation, usually in the installation or maintenance of machinery or startup of facilities. While different, they’re often executed together in sequence and referred to as a unit.
Commissioning: A well-planned, documented approach to the start-up and turnover of facilities, systems, and equipment to the end user.
Qualification: The documented verification that all aspects of a facility, utility, or equipment that can affect product quality adhere to approved specifications.