In the past, and probably in this column years ago, I was a passionate proponent of making functional performance test execution a prerequisite for substantial completion. This seemed to be an obvious way of integrating the new commissioning processes into the standard project delivery model. Although successful completion of functional performance testing could be reserved as a final completion requirement, it seemed appropriate that all dynamic system testing should at least be attempted, in order for any outstanding performance issues to be included in the project’s official substantial completion punchlist.