Which phase of the commissioning process involves verifying that systems meet the specified requirements?

The functional testing phase is critical to the commissioning process as it specifically focuses on verifying that all systems operate in accordance with the specified requirements. During this phase, commissioning technicians conduct a series of tests to check the performance and functionality of systems and components. This involves not only testing that each individual system operates correctly but also that they interact properly with one another, ensuring that they meet the design intent and project specifications.

Functional testing is essential to identify issues, confirm that systems are installed correctly, and ensure that they perform under various conditions before the project is fully completed. It acts as a crucial step in validating the overall effectiveness and efficiency of the systems involved. This attention to detail ensures that any problems can be addressed prior to project turnover, ultimately leading to enhanced building performance and occupant satisfaction.

In contrast, while the planning phase focuses on developing strategies and documentation for the commissioning process, the implementation phase involves the actual installation and setup of systems. The closeout phase deals with finalizing project documentation and transitioning systems to the owner, but it does not focus on verifying system performance.