Which activities are typically included in the Existing Building Commissioning process?

• A. Design, construction, occupancy, and decommissioning.
• B. Marketing, financing, and operations.
• C. Planning, investigating, implementing, verifying, and documenting.
• D. Procurement, installation, and testing.

Answer: (C)

Existing Building Commissioning follows a deliberate sequence to make sure an already operating building performs as intended. It starts with planning to define goals, scope, and success criteria. Then comes investigating, where data is collected, equipment and controls are reviewed, and baselines are established. Next, implementation puts the necessary adjustments in place—tuning controls, fixing faulty equipment, and applying upgrades or changes. Verification then tests and confirms that the building operates to the defined criteria, including performance and energy savings, under actual operating conditions. Finally, documentation records what was done, the results, and provides guidance for ongoing operations and maintenance. This set of activities—planning, investigating, implementing, verifying, and documenting—captures the full, structured approach of existing-building commissioning.

Other options don’t fit as well because they describe activities that are not the typical, end-to-end EBCx process. Design and construction belong to new-building projects or major renovations, not the ongoing optimization of existing operations. Marketing, financing, and general operations are business processes rather than the commissioning workflow. Procurement, installation, and testing cover parts of project execution but don’t reflect the complete, systematic sequence of planning, investigating, implementing, verifying, and documenting that characterizes existing-building commissioning.