Commissioning can be considered complete when the applicable testing requirements have been satisfied, required documentation has been delivered, deficiencies have been resolved or formally addressed, and designated stakeholders have completed the agreed acceptance process.

Completion criteria should be defined before testing begins so project teams understand what evidence is required. For complex systems, commissioning completion may also depend on training, configuration handover, integration verification, or an agreed period of operational observation.

A documented acceptance process helps distinguish genuine operational readiness from a project that is merely physically installed.