What are the two main approaches to commissioning?

• A. Comprehensive and construction
• B. Design-build and design-bid-build
• C. Predictive and reactive
• D. Centralized and decentralized

Answer: (A)

The main idea being tested is how commissioning is scoped and timed. There are two common ways to approach it: a comprehensive, end-to-end process that covers all building systems from planning through occupancy, and a construction-phase approach that focuses commissioning activities during construction on key systems or assemblies.

Comprehensive commissioning involves reviewing the design, coordinating across all major systems, conducting functional tests, and verifying that the building operates as intended once occupied. It aims to ensure the entire building meets the owner’s goals and performance targets across the whole spectrum of systems.

The construction-phase approach, by contrast, brings commissioning into the construction period, validating installations, performing tests, and resolving issues before occupancy, often concentrating on critical or high-risk systems. This can accelerate turnover and catch problems early, but may not document or prove all systems’ performance to the same extent as a full, end-to-end process unless extended later.

The other options describe procurement methods (design-build vs design-bid-build), issue-management styles (predictive vs reactive), or organizational structures (centralized vs decentralized), none of which define the primary ways commissioning is scoped and executed.