What is the purpose of ASHRAE Guideline 0?

• A. To describe the commissioning process capable of verifying that a facility and its systems meet the Owner's Project Requirements.
• B. To describe how to design a building's mechanical systems.
• C. To certify Cx providers.
• D. To provide guidelines for energy codes and standards.

Answer: (A)

Guideline 0 provides the framework for the commissioning process itself. It defines how the project team plans, executes, and verifies that a facility and its systems meet the Owner’s Project Requirements (OPR). This includes roles and responsibilities, deliverables, documentation, and the sequence of activities—from planning through design review, construction, testing, commissioning, and post-occupancy verification. By tying the OPR to the Basis of Design and detailing the expected tests and verifications, Guideline 0 ensures there is verifiable evidence that the built project actually fulfills what the owner intended. It isn’t about designing mechanical systems, certifying commissioning providers, or setting energy-code guidelines, but about the process used to confirm the project achieves the owner’s requirements.