Building enclosure commissioning

Building Enclosure Commissioning (BECx) (sometimes 'envelope' is used instead of 'enclosure') is a quality-focused process wherein the energy performance of a facility, system or assembly is evaluated and verified against defined objectives and criteria. The process itself is carried out by a commissioning team which uses reliable and accurate measures to verify that the project is meeting specific quality requirements outlined by the owner of the project.

Source: Wikipedia — Building enclosure commissioning (CC BY-SA 4.0)