CSI describes commissioning as a quality-focused, systematic process for verifying and documenting that the facility and its systems meet the Owner’s Project Requirements (OPR). Within commissioning types, Total Project Commissioning (also called whole-building or total building commissioning) is defined as:

Encompassing the entire facility, including building envelope, systems, and interfaces.

Ensuring that all systems and assemblies operate together as an integrated whole to achieve performance targets (energy, comfort, safety, functionality, etc.).

Involving activities from design through occupancy: reviews, tests, training, and performance verification.

Because the question specifically asks for the process that ensures all systems work together effectively to meet overall project performance goals, that description matches Total Project Commissioning (Option A).

Why the others are incorrect:

B. Inspection by architect – A/E inspections or observations confirm general conformance with the contract documents but are not a comprehensive performance verification process for all systems.

C. Safety testing – Focuses only on safety-related aspects, not on full integration and performance of all systems.

D. Field testing – Typically refers to testing of specific components or systems in the field; it is one tool within commissioning, not the overall coordinating process.

Relevant CSI references (no links):

CSI Project Delivery Practice Guide – commissioning chapter (systems & equipment, building envelope, and total project commissioning).

CSI CDT Body of Knowledge – sections on commissioning scope, objectives, and responsibilities across project phases.