In which phase of commissioning would you conduct testing and verification of systems?

The correct phase for conducting testing and verification of systems is the functional testing phase. During this phase, the commissioning team assesses whether the building systems operate according to their design and intended use. This involves running tests on equipment and systems, verifying their performance against specifications, and ensuring that all components interact properly. It is a critical step to confirm that everything functions together effectively before the building is officially turned over for use.

In contrast, the planning phase primarily involves establishing the commissioning process and defining goals and objectives, while the implementation phase focuses on installing systems and components. The closeout phase addresses documentation and final reporting after the commissioning process is complete, rather than continuing the active testing and verification of the systems themselves. Thus, functional testing is where the practical verification of system performance occurs, ensuring that all systems meet the required standards and expectations.