Which milestone marks the initiation of commissioning activities and the verification of systems performance?

Which milestone marks the initiation of commissioning activities and the verification of systems performance?

• A. Substantial Completion
• B. Project Closeout
• C. Substantiation
• D. Quality Assurance

Answer: (C)

Substantiation is the formal point in the project where the owner and design-build team verify that the installed systems meet the specified performance criteria and that the design intent can be realized in operation. This milestone triggers the commissioning activities, which include functional tests, performance verification, controls checks, documentation, and operator training to prove that systems perform as intended before occupancy. Substantial completion marks construction readiness for occupancy, while project closeout is administrative, and quality assurance is ongoing quality work. None of those alone initiates the formal verification of performance like substantiation does.

Substantiation is the formal point in the project where the owner and design-build team verify that the installed systems meet the specified performance criteria and that the design intent can be realized in operation. This milestone triggers the commissioning activities, which include functional tests, performance verification, controls checks, documentation, and operator training to prove that systems perform as intended before occupancy. Substantial completion marks construction readiness for occupancy, while project closeout is administrative, and quality assurance is ongoing quality work. None of those alone initiates the formal verification of performance like substantiation does.